{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2024-40957", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-12T12:17:45.593Z", "datePublished": "2024-07-12T12:31:59.747Z", "dateUpdated": "2026-05-11T20:23:06.550Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T20:23:06.550Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nseg6: fix parameter passing when calling NF_HOOK() in End.DX4 and End.DX6 behaviors\n\ninput_action_end_dx4() and input_action_end_dx6() are called NF_HOOK() for\nPREROUTING hook, in PREROUTING hook, we should passing a valid indev,\nand a NULL outdev to NF_HOOK(), otherwise may trigger a NULL pointer\ndereference, as below:\n\n [74830.647293] BUG: kernel NULL pointer dereference, address: 0000000000000090\n [74830.655633] #PF: supervisor read access in kernel mode\n [74830.657888] #PF: error_code(0x0000) - not-present page\n [74830.659500] PGD 0 P4D 0\n [74830.660450] Oops: 0000 [#1] PREEMPT SMP PTI\n ...\n [74830.664953] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011\n [74830.666569] RIP: 0010:rpfilter_mt+0x44/0x15e [ipt_rpfilter]\n ...\n [74830.689725] Call Trace:\n [74830.690402] <IRQ>\n [74830.690953] ? show_trace_log_lvl+0x1c4/0x2df\n [74830.692020] ? show_trace_log_lvl+0x1c4/0x2df\n [74830.693095] ? ipt_do_table+0x286/0x710 [ip_tables]\n [74830.694275] ? __die_body.cold+0x8/0xd\n [74830.695205] ? page_fault_oops+0xac/0x140\n [74830.696244] ? exc_page_fault+0x62/0x150\n [74830.697225] ? asm_exc_page_fault+0x22/0x30\n [74830.698344] ? rpfilter_mt+0x44/0x15e [ipt_rpfilter]\n [74830.699540] ipt_do_table+0x286/0x710 [ip_tables]\n [74830.700758] ? ip6_route_input+0x19d/0x240\n [74830.701752] nf_hook_slow+0x3f/0xb0\n [74830.702678] input_action_end_dx4+0x19b/0x1e0\n [74830.703735] ? input_action_end_t+0xe0/0xe0\n [74830.704734] seg6_local_input_core+0x2d/0x60\n [74830.705782] lwtunnel_input+0x5b/0xb0\n [74830.706690] __netif_receive_skb_one_core+0x63/0xa0\n [74830.707825] process_backlog+0x99/0x140\n [74830.709538] __napi_poll+0x2c/0x160\n [74830.710673] net_rx_action+0x296/0x350\n [74830.711860] __do_softirq+0xcb/0x2ac\n [74830.713049] do_softirq+0x63/0x90\n\ninput_action_end_dx4() passing a NULL indev to NF_HOOK(), and finally\ntrigger a NULL dereference in rpfilter_mt()->rpfilter_is_loopback():\n\n static bool\n rpfilter_is_loopback(const struct sk_buff *skb,\n \t const struct net_device *in)\n {\n // in is NULL\n return skb->pkt_type == PACKET_LOOPBACK ||\n \t in->flags & IFF_LOOPBACK;\n }"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv6/seg6_local.c"], "versions": [{"version": "7a3f5b0de3647c854e34269c3332d7a1e902901a", "lessThan": "af90e3d73dc45778767b2fb6e7edd57ebe34380d", "status": "affected", "versionType": "git"}, {"version": "7a3f5b0de3647c854e34269c3332d7a1e902901a", "lessThan": "ec4d970b597ee5e17b0d8d73b7875197ce9a04d4", "status": "affected", "versionType": "git"}, {"version": "7a3f5b0de3647c854e34269c3332d7a1e902901a", "lessThan": "d62df86c172033679d744f07d89e93e367dd11f6", "status": "affected", "versionType": "git"}, {"version": "7a3f5b0de3647c854e34269c3332d7a1e902901a", "lessThan": "561475d53aa7e4511ee7cdba8728ded81cf1db1c", "status": "affected", "versionType": "git"}, {"version": "7a3f5b0de3647c854e34269c3332d7a1e902901a", "lessThan": "9a3bc8d16e0aacd65c31aaf23a2bced3288a7779", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv6/seg6_local.c"], "versions": [{"version": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.162", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.96", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.36", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.9.7", "lessThanOrEqual": "6.9.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.10", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "5.15.162"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.96"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.36"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.9.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.10"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/af90e3d73dc45778767b2fb6e7edd57ebe34380d"}, {"url": "https://git.kernel.org/stable/c/ec4d970b597ee5e17b0d8d73b7875197ce9a04d4"}, {"url": "https://git.kernel.org/stable/c/d62df86c172033679d744f07d89e93e367dd11f6"}, {"url": "https://git.kernel.org/stable/c/561475d53aa7e4511ee7cdba8728ded81cf1db1c"}, {"url": "https://git.kernel.org/stable/c/9a3bc8d16e0aacd65c31aaf23a2bced3288a7779"}], "title": "seg6: fix parameter passing when calling NF_HOOK() in End.DX4 and End.DX6 behaviors", 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[{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T17:03:38.761289Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:34:24.035Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/af90e3d73dc45778767b2fb6e7edd57ebe34380d", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/ec4d970b597ee5e17b0d8d73b7875197ce9a04d4", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/d62df86c172033679d744f07d89e93e367dd11f6", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/561475d53aa7e4511ee7cdba8728ded81cf1db1c", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/9a3bc8d16e0aacd65c31aaf23a2bced3288a7779", "tags": ["x_transferred"]}, {"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T21:58:21.536Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-40957", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T17:03:38.761289Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T12:42:22.423Z"}}], "cna": {"title": "seg6: fix parameter passing when calling NF_HOOK() in End.DX4 and End.DX6 behaviors", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "7a3f5b0de3647c854e34269c3332d7a1e902901a", "lessThan": "af90e3d73dc45778767b2fb6e7edd57ebe34380d", "versionType": "git"}, {"status": "affected", "version": "7a3f5b0de3647c854e34269c3332d7a1e902901a", "lessThan": "ec4d970b597ee5e17b0d8d73b7875197ce9a04d4", "versionType": "git"}, {"status": "affected", "version": "7a3f5b0de3647c854e34269c3332d7a1e902901a", "lessThan": "d62df86c172033679d744f07d89e93e367dd11f6", "versionType": "git"}, {"status": "affected", "version": "7a3f5b0de3647c854e34269c3332d7a1e902901a", "lessThan": "561475d53aa7e4511ee7cdba8728ded81cf1db1c", "versionType": "git"}, {"status": "affected", "version": "7a3f5b0de3647c854e34269c3332d7a1e902901a", "lessThan": "9a3bc8d16e0aacd65c31aaf23a2bced3288a7779", "versionType": "git"}], "programFiles": ["net/ipv6/seg6_local.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.15"}, {"status": "unaffected", "version": "0", "lessThan": "5.15", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.162", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.96", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.36", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.9.7", "versionType": "semver", "lessThanOrEqual": "6.9.*"}, {"status": "unaffected", "version": "6.10", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/ipv6/seg6_local.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/af90e3d73dc45778767b2fb6e7edd57ebe34380d"}, {"url": "https://git.kernel.org/stable/c/ec4d970b597ee5e17b0d8d73b7875197ce9a04d4"}, {"url": "https://git.kernel.org/stable/c/d62df86c172033679d744f07d89e93e367dd11f6"}, {"url": "https://git.kernel.org/stable/c/561475d53aa7e4511ee7cdba8728ded81cf1db1c"}, {"url": "https://git.kernel.org/stable/c/9a3bc8d16e0aacd65c31aaf23a2bced3288a7779"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nseg6: fix parameter passing when calling NF_HOOK() in End.DX4 and End.DX6 behaviors\n\ninput_action_end_dx4() and input_action_end_dx6() are called NF_HOOK() for\nPREROUTING hook, in PREROUTING hook, we should passing a valid indev,\nand a NULL outdev to NF_HOOK(), otherwise may trigger a NULL pointer\ndereference, as below:\n\n [74830.647293] BUG: kernel NULL pointer dereference, address: 0000000000000090\n [74830.655633] #PF: supervisor read access in kernel mode\n [74830.657888] #PF: error_code(0x0000) - not-present page\n [74830.659500] PGD 0 P4D 0\n [74830.660450] Oops: 0000 [#1] PREEMPT SMP PTI\n ...\n [74830.664953] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011\n [74830.666569] RIP: 0010:rpfilter_mt+0x44/0x15e [ipt_rpfilter]\n ...\n [74830.689725] Call Trace:\n [74830.690402] <IRQ>\n [74830.690953] ? show_trace_log_lvl+0x1c4/0x2df\n [74830.692020] ? show_trace_log_lvl+0x1c4/0x2df\n [74830.693095] ? ipt_do_table+0x286/0x710 [ip_tables]\n [74830.694275] ? __die_body.cold+0x8/0xd\n [74830.695205] ? page_fault_oops+0xac/0x140\n [74830.696244] ? exc_page_fault+0x62/0x150\n [74830.697225] ? asm_exc_page_fault+0x22/0x30\n [74830.698344] ? rpfilter_mt+0x44/0x15e [ipt_rpfilter]\n [74830.699540] ipt_do_table+0x286/0x710 [ip_tables]\n [74830.700758] ? ip6_route_input+0x19d/0x240\n [74830.701752] nf_hook_slow+0x3f/0xb0\n [74830.702678] input_action_end_dx4+0x19b/0x1e0\n [74830.703735] ? input_action_end_t+0xe0/0xe0\n [74830.704734] seg6_local_input_core+0x2d/0x60\n [74830.705782] lwtunnel_input+0x5b/0xb0\n [74830.706690] __netif_receive_skb_one_core+0x63/0xa0\n [74830.707825] process_backlog+0x99/0x140\n [74830.709538] __napi_poll+0x2c/0x160\n [74830.710673] net_rx_action+0x296/0x350\n [74830.711860] __do_softirq+0xcb/0x2ac\n [74830.713049] do_softirq+0x63/0x90\n\ninput_action_end_dx4() passing a NULL indev to NF_HOOK(), and finally\ntrigger a NULL dereference in rpfilter_mt()->rpfilter_is_loopback():\n\n static bool\n rpfilter_is_loopback(const struct sk_buff *skb,\n \t const struct net_device *in)\n {\n // in is NULL\n return skb->pkt_type == PACKET_LOOPBACK ||\n \t in->flags & IFF_LOOPBACK;\n }"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.162", "versionStartIncluding": "5.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.96", "versionStartIncluding": "5.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.36", "versionStartIncluding": "5.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.9.7", "versionStartIncluding": "5.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.10", "versionStartIncluding": "5.15"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T20:23:06.550Z"}}}, "cveMetadata": {"cveId": "CVE-2024-40957", "state": "PUBLISHED", "dateUpdated": "2026-05-11T20:23:06.550Z", "dateReserved": "2024-07-12T12:17:45.593Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-07-12T12:31:59.747Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "4626E4B7-D5F4-42CC-93A8-B73E6384273F", "versionEndExcluding": "5.15.162", "versionStartIncluding": "5.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "61E887B4-732A-40D2-9983-CC6F281EBFB7", "versionEndExcluding": "6.1.96", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E1046C95-860A-45B0-B718-2B29F65BFF10", "versionEndExcluding": "6.6.36", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0A047AF2-94AC-4A3A-B32D-6AB930D8EF1C", "versionEndExcluding": "6.9.7", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:*", "matchCriteriaId": "2EBB4392-5FA6-4DA9-9772-8F9C750109FA", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*", "matchCriteriaId": "331C2F14-12C7-45D5-893D-8C52EE38EA10", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:*", "matchCriteriaId": "3173713D-909A-4DD3-9DD4-1E171EB057EE", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.10:rc4:*:*:*:*:*:*", "matchCriteriaId": "79F18AFA-40F7-43F0-BA30-7BDB65F918B9", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nseg6: fix parameter passing when calling NF_HOOK() in End.DX4 and End.DX6 behaviors\n\ninput_action_end_dx4() and input_action_end_dx6() are called NF_HOOK() for\nPREROUTING hook, in PREROUTING hook, we should passing a valid indev,\nand a NULL outdev to NF_HOOK(), otherwise may trigger a NULL pointer\ndereference, as below:\n\n [74830.647293] BUG: kernel NULL pointer dereference, address: 0000000000000090\n [74830.655633] #PF: supervisor read access in kernel mode\n [74830.657888] #PF: error_code(0x0000) - not-present page\n [74830.659500] PGD 0 P4D 0\n [74830.660450] Oops: 0000 [#1] PREEMPT SMP PTI\n ...\n [74830.664953] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011\n [74830.666569] RIP: 0010:rpfilter_mt+0x44/0x15e [ipt_rpfilter]\n ...\n [74830.689725] Call Trace:\n [74830.690402] <IRQ>\n [74830.690953] ? show_trace_log_lvl+0x1c4/0x2df\n [74830.692020] ? show_trace_log_lvl+0x1c4/0x2df\n [74830.693095] ? ipt_do_table+0x286/0x710 [ip_tables]\n [74830.694275] ? __die_body.cold+0x8/0xd\n [74830.695205] ? page_fault_oops+0xac/0x140\n [74830.696244] ? exc_page_fault+0x62/0x150\n [74830.697225] ? asm_exc_page_fault+0x22/0x30\n [74830.698344] ? rpfilter_mt+0x44/0x15e [ipt_rpfilter]\n [74830.699540] ipt_do_table+0x286/0x710 [ip_tables]\n [74830.700758] ? ip6_route_input+0x19d/0x240\n [74830.701752] nf_hook_slow+0x3f/0xb0\n [74830.702678] input_action_end_dx4+0x19b/0x1e0\n [74830.703735] ? input_action_end_t+0xe0/0xe0\n [74830.704734] seg6_local_input_core+0x2d/0x60\n [74830.705782] lwtunnel_input+0x5b/0xb0\n [74830.706690] __netif_receive_skb_one_core+0x63/0xa0\n [74830.707825] process_backlog+0x99/0x140\n [74830.709538] __napi_poll+0x2c/0x160\n [74830.710673] net_rx_action+0x296/0x350\n [74830.711860] __do_softirq+0xcb/0x2ac\n [74830.713049] do_softirq+0x63/0x90\n\ninput_action_end_dx4() passing a NULL indev to NF_HOOK(), and finally\ntrigger a NULL dereference in rpfilter_mt()->rpfilter_is_loopback():\n\n static bool\n rpfilter_is_loopback(const struct sk_buff *skb,\n \t const struct net_device *in)\n {\n // in is NULL\n return skb->pkt_type == PACKET_LOOPBACK ||\n \t in->flags & IFF_LOOPBACK;\n }"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: seg6: corrige el paso de par\u00e1metros al llamar a NF_HOOK() en los comportamientos End.DX4 y End.DX6 input_action_end_dx4() y input_action_end_dx6() se llaman NF_HOOK() para el gancho PREROUTING, en el gancho PREROUTING , debemos pasar un indev v\u00e1lido y un outdev NULL a NF_HOOK(); de lo contrario, podemos desencadenar una desreferencia del puntero NULL, como se muestra a continuaci\u00f3n: [74830.647293] ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 00000000000000090 [74830.655633] #PF: acceso de lectura del supervisor en modo kernel [74830.657888] #PF: error_code(0x0000) - p\u00e1gina no presente [74830.659500] PGD 0 P4D 0 [74830.660450] Ups: 0000 [#1] PREEMPT SMP PTI... [74830.664953] Nombre de hardware: Red Hat KVM , BIOS 0.5.1 01/01/2011 [74830.666569] RIP: 0010:rpfilter_mt+0x44/0x15e [ipt_rpfilter] ... [74830.689725] Seguimiento de llamadas: [74830.690402] [74830.690953] ? show_trace_log_lvl+0x1c4/0x2df [74830.692020] ? show_trace_log_lvl+0x1c4/0x2df [74830.693095] ? ipt_do_table+0x286/0x710 [ip_tables] [74830.694275] ? __die_body.cold+0x8/0xd [74830.695205] ? page_fault_oops+0xac/0x140 [74830.696244] ? exc_page_fault+0x62/0x150 [74830.697225] ? asm_exc_page_fault+0x22/0x30 [74830.698344] ? rpfilter_mt+0x44/0x15e [ipt_rpfilter] [74830.699540] ipt_do_table+0x286/0x710 [ip_tables] [74830.700758] ? ip6_route_input+0x19d/0x240 [74830.701752] nf_hook_slow+0x3f/0xb0 [74830.702678] input_action_end_dx4+0x19b/0x1e0 [74830.703735] ? input_action_end_t+0xe0/0xe0 [74830.704734] seg6_local_input_core+0x2d/0x60 [74830.705782] lwtunnel_input+0x5b/0xb0 [74830.706690] __netif_receive_skb_one_core+0x63/0xa0 830.707825] proceso_atrasado+0x99/0x140 [74830.709538] __napi_poll+0x2c/0x160 [74830.710673] net_rx_action+ 0x296/0x350 [74830.711860] __do_softirq+0xcb/0x2ac [74830.713049] do_softirq+0x63/0x90 input_action_end_dx4() pasando un indev NULL a NF_HOOK(), y finalmente activa una desreferencia NULL en rpfilter_mt()-&gt;rpfilter_is_lo opback(): bool est\u00e1tico rpfilter_is_loopback (const struct sk_buff *skb, const struct net_device *in) { // in es NULL return skb-&gt;pkt_type == PACKET_LOOPBACK || en-&gt;flags &amp; IFF_LOOPBACK; }"}], "id": "CVE-2024-40957", "lastModified": "2025-11-03T22:17:17.537", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-07-12T13:15:17.823", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/561475d53aa7e4511ee7cdba8728ded81cf1db1c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9a3bc8d16e0aacd65c31aaf23a2bced3288a7779"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/af90e3d73dc45778767b2fb6e7edd57ebe34380d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d62df86c172033679d744f07d89e93e367dd11f6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ec4d970b597ee5e17b0d8d73b7875197ce9a04d4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/561475d53aa7e4511ee7cdba8728ded81cf1db1c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9a3bc8d16e0aacd65c31aaf23a2bced3288a7779"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/af90e3d73dc45778767b2fb6e7edd57ebe34380d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d62df86c172033679d744f07d89e93e367dd11f6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ec4d970b597ee5e17b0d8d73b7875197ce9a04d4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:5928", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.33.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-08-28T00:00:00Z"}, {"advisory": "RHSA-2024:5928", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.33.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-08-28T00:00:00Z"}], "bugzilla": {"description": "kernel: seg6: fix parameter passing when calling NF_HOOK() in End.DX4 and End.DX6 behaviors", "id": "2297541", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2297541"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nseg6: fix parameter passing when calling NF_HOOK() in End.DX4 and End.DX6 behaviors\ninput_action_end_dx4() and input_action_end_dx6() are called NF_HOOK() for\nPREROUTING hook, in PREROUTING hook, we should passing a valid indev,\nand a NULL outdev to NF_HOOK(), otherwise may trigger a NULL pointer\ndereference, as below:\n[74830.647293] BUG: kernel NULL pointer dereference, address: 0000000000000090\n[74830.655633] #PF: supervisor read access in kernel mode\n[74830.657888] #PF: error_code(0x0000) - not-present page\n[74830.659500] PGD 0 P4D 0\n[74830.660450] Oops: 0000 [#1] PREEMPT SMP PTI\n...\n[74830.664953] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011\n[74830.666569] RIP: 0010:rpfilter_mt+0x44/0x15e [ipt_rpfilter]\n...\n[74830.689725] Call Trace:\n[74830.690402] <IRQ>\n[74830.690953] ? show_trace_log_lvl+0x1c4/0x2df\n[74830.692020] ? show_trace_log_lvl+0x1c4/0x2df\n[74830.693095] ? ipt_do_table+0x286/0x710 [ip_tables]\n[74830.694275] ? __die_body.cold+0x8/0xd\n[74830.695205] ? page_fault_oops+0xac/0x140\n[74830.696244] ? exc_page_fault+0x62/0x150\n[74830.697225] ? asm_exc_page_fault+0x22/0x30\n[74830.698344] ? rpfilter_mt+0x44/0x15e [ipt_rpfilter]\n[74830.699540] ipt_do_table+0x286/0x710 [ip_tables]\n[74830.700758] ? ip6_route_input+0x19d/0x240\n[74830.701752] nf_hook_slow+0x3f/0xb0\n[74830.702678] input_action_end_dx4+0x19b/0x1e0\n[74830.703735] ? input_action_end_t+0xe0/0xe0\n[74830.704734] seg6_local_input_core+0x2d/0x60\n[74830.705782] lwtunnel_input+0x5b/0xb0\n[74830.706690] __netif_receive_skb_one_core+0x63/0xa0\n[74830.707825] process_backlog+0x99/0x140\n[74830.709538] __napi_poll+0x2c/0x160\n[74830.710673] net_rx_action+0x296/0x350\n[74830.711860] __do_softirq+0xcb/0x2ac\n[74830.713049] do_softirq+0x63/0x90\ninput_action_end_dx4() passing a NULL indev to NF_HOOK(), and finally\ntrigger a NULL dereference in rpfilter_mt()->rpfilter_is_loopback():\nstatic bool\nrpfilter_is_loopback(const struct sk_buff *skb,\nconst struct net_device *in)\n{\n// in is NULL\nreturn skb->pkt_type == PACKET_LOOPBACK ||\nin->flags & IFF_LOOPBACK;\n}"], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2024-40957", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-07-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-40957\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-40957\nhttps://lore.kernel.org/linux-cve-announce/2024071224-CVE-2024-40957-94a5@gregkh/T"], "threat_severity": "Moderate"}

{}