{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31419", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.088Z", "datePublished": "2026-04-13T13:40:23.279Z", "dateUpdated": "2026-05-11T22:08:20.680Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:08:20.680Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bonding: fix use-after-free in bond_xmit_broadcast()\n\nbond_xmit_broadcast() reuses the original skb for the last slave\n(determined by bond_is_last_slave()) and clones it for others.\nConcurrent slave enslave/release can mutate the slave list during\nRCU-protected iteration, changing which slave is \"last\" mid-loop.\nThis causes the original skb to be double-consumed (double-freed).\n\nReplace the racy bond_is_last_slave() check with a simple index\ncomparison (i + 1 == slaves_count) against the pre-snapshot slave\ncount taken via READ_ONCE() before the loop. This preserves the\nzero-copy optimization for the last slave while making the \"last\"\ndetermination stable against concurrent list mutations.\n\nThe UAF can trigger the following crash:\n\n==================================================================\nBUG: KASAN: slab-use-after-free in skb_clone\nRead of size 8 at addr ffff888100ef8d40 by task exploit/147\n\nCPU: 1 UID: 0 PID: 147 Comm: exploit Not tainted 7.0.0-rc3+ #4 PREEMPTLAZY\nCall Trace:\n <TASK>\n dump_stack_lvl (lib/dump_stack.c:123)\n print_report (mm/kasan/report.c:379 mm/kasan/report.c:482)\n kasan_report (mm/kasan/report.c:597)\n skb_clone (include/linux/skbuff.h:1724 include/linux/skbuff.h:1792 include/linux/skbuff.h:3396 net/core/skbuff.c:2108)\n bond_xmit_broadcast (drivers/net/bonding/bond_main.c:5334)\n bond_start_xmit (drivers/net/bonding/bond_main.c:5567 drivers/net/bonding/bond_main.c:5593)\n dev_hard_start_xmit (include/linux/netdevice.h:5325 include/linux/netdevice.h:5334 net/core/dev.c:3871 net/core/dev.c:3887)\n __dev_queue_xmit (include/linux/netdevice.h:3601 net/core/dev.c:4838)\n ip6_finish_output2 (include/net/neighbour.h:540 include/net/neighbour.h:554 net/ipv6/ip6_output.c:136)\n ip6_finish_output (net/ipv6/ip6_output.c:208 net/ipv6/ip6_output.c:219)\n ip6_output (net/ipv6/ip6_output.c:250)\n ip6_send_skb (net/ipv6/ip6_output.c:1985)\n udp_v6_send_skb (net/ipv6/udp.c:1442)\n udpv6_sendmsg (net/ipv6/udp.c:1733)\n __sys_sendto (net/socket.c:730 net/socket.c:742 net/socket.c:2206)\n __x64_sys_sendto (net/socket.c:2209)\n do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n </TASK>\n\nAllocated by task 147:\n\nFreed by task 147:\n\nThe buggy address belongs to the object at ffff888100ef8c80\n which belongs to the cache skbuff_head_cache of size 224\nThe buggy address is located 192 bytes inside of\n freed 224-byte region [ffff888100ef8c80, ffff888100ef8d60)\n\nMemory state around the buggy address:\n ffff888100ef8c00: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc\n ffff888100ef8c80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n>ffff888100ef8d00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc\n ^\n ffff888100ef8d80: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb\n ffff888100ef8e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n=================================================================="}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/bonding/bond_main.c"], "versions": [{"version": "4e5bd03ae34652cd932ab4c91c71c511793df75c", "lessThan": "3453882f36c40d2339267093676585a89808a73d", "status": "affected", "versionType": "git"}, {"version": "4e5bd03ae34652cd932ab4c91c71c511793df75c", "lessThan": "d4cc7e4c80b1634c7b1497574a2fdb18df6c026c", "status": "affected", "versionType": "git"}, {"version": "4e5bd03ae34652cd932ab4c91c71c511793df75c", "lessThan": "f5b94654a4a19891a8108d66ef166de6c028c6cd", "status": "affected", "versionType": "git"}, {"version": "4e5bd03ae34652cd932ab4c91c71c511793df75c", "lessThan": "2884bf72fb8f03409e423397319205de48adca16", "status": "affected", "versionType": "git"}, {"version": "20949c3816463e97c6f8fe84c0280c7e5ae83a8d", "status": "affected", "versionType": "git"}, {"version": "f1d206181f19b00b275b258fea1418718a2f4173", "status": "affected", "versionType": "git"}, {"version": "c1f1691ef84fa6d38fa5e5148eca073145e97ffa", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/bonding/bond_main.c"], "versions": [{"version": "5.17", "status": "affected"}, {"version": "0", "lessThan": "5.17", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.86", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.22", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.12", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "5.17", "versionEndExcluding": "6.12.86"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.18.22"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.19.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "7.0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.94"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.17"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.16.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3453882f36c40d2339267093676585a89808a73d"}, {"url": "https://git.kernel.org/stable/c/d4cc7e4c80b1634c7b1497574a2fdb18df6c026c"}, {"url": "https://git.kernel.org/stable/c/f5b94654a4a19891a8108d66ef166de6c028c6cd"}, {"url": "https://git.kernel.org/stable/c/2884bf72fb8f03409e423397319205de48adca16"}], "title": "net: bonding: fix use-after-free in bond_xmit_broadcast()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bonding: fix use-after-free in bond_xmit_broadcast()\n\nbond_xmit_broadcast() reuses the original skb for the last slave\n(determined by bond_is_last_slave()) and clones it for others.\nConcurrent slave enslave/release can mutate the slave list during\nRCU-protected iteration, changing which slave is \"last\" mid-loop.\nThis causes the original skb to be double-consumed (double-freed).\n\nReplace the racy bond_is_last_slave() check with a simple index\ncomparison (i + 1 == slaves_count) against the pre-snapshot slave\ncount taken via READ_ONCE() before the loop. This preserves the\nzero-copy optimization for the last slave while making the \"last\"\ndetermination stable against concurrent list mutations.\n\nThe UAF can trigger the following crash:\n\n==================================================================\nBUG: KASAN: slab-use-after-free in skb_clone\nRead of size 8 at addr ffff888100ef8d40 by task exploit/147\n\nCPU: 1 UID: 0 PID: 147 Comm: exploit Not tainted 7.0.0-rc3+ #4 PREEMPTLAZY\nCall Trace:\n <TASK>\n dump_stack_lvl (lib/dump_stack.c:123)\n print_report (mm/kasan/report.c:379 mm/kasan/report.c:482)\n kasan_report (mm/kasan/report.c:597)\n skb_clone (include/linux/skbuff.h:1724 include/linux/skbuff.h:1792 include/linux/skbuff.h:3396 net/core/skbuff.c:2108)\n bond_xmit_broadcast (drivers/net/bonding/bond_main.c:5334)\n bond_start_xmit (drivers/net/bonding/bond_main.c:5567 drivers/net/bonding/bond_main.c:5593)\n dev_hard_start_xmit (include/linux/netdevice.h:5325 include/linux/netdevice.h:5334 net/core/dev.c:3871 net/core/dev.c:3887)\n __dev_queue_xmit (include/linux/netdevice.h:3601 net/core/dev.c:4838)\n ip6_finish_output2 (include/net/neighbour.h:540 include/net/neighbour.h:554 net/ipv6/ip6_output.c:136)\n ip6_finish_output (net/ipv6/ip6_output.c:208 net/ipv6/ip6_output.c:219)\n ip6_output (net/ipv6/ip6_output.c:250)\n ip6_send_skb (net/ipv6/ip6_output.c:1985)\n udp_v6_send_skb (net/ipv6/udp.c:1442)\n udpv6_sendmsg (net/ipv6/udp.c:1733)\n __sys_sendto (net/socket.c:730 net/socket.c:742 net/socket.c:2206)\n __x64_sys_sendto (net/socket.c:2209)\n do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n </TASK>\n\nAllocated by task 147:\n\nFreed by task 147:\n\nThe buggy address belongs to the object at ffff888100ef8c80\n which belongs to the cache skbuff_head_cache of size 224\nThe buggy address is located 192 bytes inside of\n freed 224-byte region [ffff888100ef8c80, ffff888100ef8d60)\n\nMemory state around the buggy address:\n ffff888100ef8c00: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc\n ffff888100ef8c80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n>ffff888100ef8d00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc\n ^\n ffff888100ef8d80: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb\n ffff888100ef8e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n=================================================================="}], "id": "CVE-2026-31419", "lastModified": "2026-05-07T06:16:03.467", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-04-13T14:16:11.447", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2884bf72fb8f03409e423397319205de48adca16"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3453882f36c40d2339267093676585a89808a73d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d4cc7e4c80b1634c7b1497574a2fdb18df6c026c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f5b94654a4a19891a8108d66ef166de6c028c6cd"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: net: bonding: fix use-after-free in bond_xmit_broadcast()", "id": "2457829", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2457829"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2026-31419", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "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", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-13T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31419\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31419\nhttps://lore.kernel.org/linux-cve-announce/2026041353-CVE-2026-31419-e176@gregkh/T"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4e5bd03ae34652cd932ab4c91c71c511793df75c,d4cc7e4c80b1634c7b1497574a2fdb18df6c026c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4e5bd03ae34652cd932ab4c91c71c511793df75c,f5b94654a4a19891a8108d66ef166de6c028c6cd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4e5bd03ae34652cd932ab4c91c71c511793df75c,2884bf72fb8f03409e423397319205de48adca16)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "20949c3816463e97c6f8fe84c0280c7e5ae83a8d"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "f1d206181f19b00b275b258fea1418718a2f4173"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "c1f1691ef84fa6d38fa5e5148eca073145e97ffa"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "5.17"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.17)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.22,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.12,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "analysis": {"en": {"generated_at": "2026-04-29T03:08:17.794853+00:00", "value": {"mitigation_remediation": ["Apply a kernel update that includes the patch for CVE-2026-31419.", "If an immediate update is not possible, temporarily disable all bonded network interfaces or remove slave devices until the kernel can be patched.", "Monitor system logs for kernel crashes associated with bonding drivers to detect any attempted exploitation."], "summary": {"action": "Immediate Patch", "impact": "Kernel crash causing denial of service"}, "threat_synthesis": {"affected_systems": "The flaw is present in any Linux kernel that includes the bond_xmit_broadcast() routine without the recent patch, i.e., all unpatched kernels of the Linux operating system. Specific kernel releases are not listed in the advisory, so any instance of the Linux kernel running the bond module before the fix is potentially vulnerable.", "description_and_impact": "A use\u2011after\u2011free bug in the Linux bonding driver allows the same socket buffer to be freed twice when a bonded interface transmits packets while a slave is concurrently reconfigured. The double free triggers a kernel panic that can bring the entire system down. This occurs in privileged kernel code; the description indicates a double free in the bonding module and KASAN reports a kernel crash. Based on the description, it is inferred that the flaw runs in kernel space and an attacker would need to trigger the race condition from a privileged or local context.", "risk_and_exploitability": "The CVSS score of 7.8 reflects moderate\u2011to\u2011high severity due to the potential for a kernel panic. Based on the description, it is inferred that the attack vector is local and requires privileged access to reconfigure bonded interfaces to induce the race condition. Because the exploit depends on concurrent changes to slave configuration, widespread exploitation is unlikely, and the EPSS score of less than 1% indicates a very low likelihood of exploitation. The vulnerability is not listed in the CISA KEV catalog."}}}}, "created": "2026-04-14T16:19:21.641659+00:00", "updated": "2026-04-29T03:15:45.994327+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416"]}