{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-68813", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-24T10:30:51.047Z", "datePublished": "2026-01-13T15:29:18.483Z", "dateUpdated": "2026-05-23T16:02:55.189Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T16:02:55.189Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: fix ipv4 null-ptr-deref in route error path\n\nThe IPv4 code path in __ip_vs_get_out_rt() calls dst_link_failure()\nwithout ensuring skb->dev is set, leading to a NULL pointer dereference\nin fib_compute_spec_dst() when ipv4_link_failure() attempts to send\nICMP destination unreachable messages.\n\nThe issue emerged after commit ed0de45a1008 (\"ipv4: recompile ip options\nin ipv4_link_failure\") started calling __ip_options_compile() from\nipv4_link_failure(). This code path eventually calls fib_compute_spec_dst()\nwhich dereferences skb->dev. An attempt was made to fix the NULL skb->dev\ndereference in commit 0113d9c9d1cc (\"ipv4: fix null-deref in\nipv4_link_failure\"), but it only addressed the immediate dev_net(skb->dev)\ndereference by using a fallback device. The fix was incomplete because\nfib_compute_spec_dst() later in the call chain still accesses skb->dev\ndirectly, which remains NULL when IPVS calls dst_link_failure().\n\nThe crash occurs when:\n1. IPVS processes a packet in NAT mode with a misconfigured destination\n2. Route lookup fails in __ip_vs_get_out_rt() before establishing a route\n3. The error path calls dst_link_failure(skb) with skb->dev == NULL\n4. ipv4_link_failure() \u2192 ipv4_send_dest_unreach() \u2192\n __ip_options_compile() \u2192 fib_compute_spec_dst()\n5. fib_compute_spec_dst() dereferences NULL skb->dev\n\nApply the same fix used for IPv6 in commit 326bf17ea5d4 (\"ipvs: fix\nipv6 route unreach panic\"): set skb->dev from skb_dst(skb)->dev before\ncalling dst_link_failure().\n\nKASAN: null-ptr-deref in range [0x0000000000000328-0x000000000000032f]\nCPU: 1 PID: 12732 Comm: syz.1.3469 Not tainted 6.6.114 #2\nRIP: 0010:__in_dev_get_rcu include/linux/inetdevice.h:233\nRIP: 0010:fib_compute_spec_dst+0x17a/0x9f0 net/ipv4/fib_frontend.c:285\nCall Trace:\n <TASK>\n spec_dst_fill net/ipv4/ip_options.c:232\n spec_dst_fill net/ipv4/ip_options.c:229\n __ip_options_compile+0x13a1/0x17d0 net/ipv4/ip_options.c:330\n ipv4_send_dest_unreach net/ipv4/route.c:1252\n ipv4_link_failure+0x702/0xb80 net/ipv4/route.c:1265\n dst_link_failure include/net/dst.h:437\n __ip_vs_get_out_rt+0x15fd/0x19e0 net/netfilter/ipvs/ip_vs_xmit.c:412\n ip_vs_nat_xmit+0x1d8/0xc80 net/netfilter/ipvs/ip_vs_xmit.c:764"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/ipvs/ip_vs_xmit.c"], "versions": [{"version": "ed0de45a1008991fdaa27a0152befcb74d126a8b", "lessThan": "dd72a93c80408f06327dd2d956eb1a656d0b5903", "status": "affected", "versionType": "git"}, {"version": "ed0de45a1008991fdaa27a0152befcb74d126a8b", "lessThan": "312d7cd88882fc6cadcc08b02287497aaaf94bcd", "status": "affected", "versionType": "git"}, {"version": "ed0de45a1008991fdaa27a0152befcb74d126a8b", "lessThan": "cdeff10851c37a002d87a035818ebd60fdb74447", "status": "affected", "versionType": "git"}, {"version": "ed0de45a1008991fdaa27a0152befcb74d126a8b", "lessThan": "4729ff0581fbb7ad098b6153b76b6f5aac94618a", "status": "affected", "versionType": "git"}, {"version": "ed0de45a1008991fdaa27a0152befcb74d126a8b", "lessThan": "25ab24df31f7af843c96a38e0781b9165216e1a8", "status": "affected", "versionType": "git"}, {"version": "ed0de45a1008991fdaa27a0152befcb74d126a8b", "lessThan": "689a627d14788ad772e0fa24c2e57a23dbc7ce90", "status": "affected", "versionType": "git"}, {"version": "ed0de45a1008991fdaa27a0152befcb74d126a8b", "lessThan": "ad891bb3d079a46a821bf2b8867854645191bab0", "status": "affected", "versionType": "git"}, {"version": "6c2fa855d8178699706b1192db2f1f8102b0ba1e", "status": "affected", "versionType": "git"}, {"version": "fbf569d2beee2a4a7a0bc8b619c26101d1211a88", "status": "affected", "versionType": "git"}, {"version": "ff71f99d5fb2daf54340e8b290d0bc4e6b4c1d38", "status": "affected", "versionType": "git"}, {"version": "3d988fcddbe7b8673a231958bd2fba61b5a7ced9", "status": "affected", "versionType": "git"}, {"version": "8a430e56a6485267a1b2d3747209d26c54d1a34b", "status": "affected", "versionType": "git"}, {"version": "6bd1ee0a993fc9574ae43c1994c54a60cb23a380", "status": "affected", "versionType": "git"}, {"version": "3.18.139", "lessThan": "3.19", "status": "affected", "versionType": "semver"}, {"version": "4.4.179", "lessThan": "4.5", "status": "affected", "versionType": "semver"}, {"version": "4.9.171", "lessThan": "4.10", "status": "affected", "versionType": "semver"}, {"version": "4.14.114", "lessThan": "4.15", "status": "affected", "versionType": "semver"}, {"version": "4.19.37", "lessThan": "4.20", "status": "affected", "versionType": "semver"}, {"version": "5.0.10", "lessThan": "5.1", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/ipvs/ip_vs_xmit.c"], "versions": [{"version": "5.1", "status": "affected"}, {"version": "0", "lessThan": "5.1", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.248", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.198", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.160", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.120", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.64", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.3", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19", "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": "5.1", "versionEndExcluding": "5.10.248"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "5.15.198"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.1.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.6.120"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.12.64"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.18.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1", "versionEndExcluding": "6.19"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18.139"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4.179"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9.171"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.37"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0.10"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/dd72a93c80408f06327dd2d956eb1a656d0b5903"}, {"url": "https://git.kernel.org/stable/c/312d7cd88882fc6cadcc08b02287497aaaf94bcd"}, {"url": "https://git.kernel.org/stable/c/cdeff10851c37a002d87a035818ebd60fdb74447"}, {"url": "https://git.kernel.org/stable/c/4729ff0581fbb7ad098b6153b76b6f5aac94618a"}, {"url": "https://git.kernel.org/stable/c/25ab24df31f7af843c96a38e0781b9165216e1a8"}, {"url": "https://git.kernel.org/stable/c/689a627d14788ad772e0fa24c2e57a23dbc7ce90"}, {"url": "https://git.kernel.org/stable/c/ad891bb3d079a46a821bf2b8867854645191bab0"}], "title": "ipvs: fix ipv4 null-ptr-deref in route error path", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: fix ipv4 null-ptr-deref in route error path\n\nThe IPv4 code path in __ip_vs_get_out_rt() calls dst_link_failure()\nwithout ensuring skb->dev is set, leading to a NULL pointer dereference\nin fib_compute_spec_dst() when ipv4_link_failure() attempts to send\nICMP destination unreachable messages.\n\nThe issue emerged after commit ed0de45a1008 (\"ipv4: recompile ip options\nin ipv4_link_failure\") started calling __ip_options_compile() from\nipv4_link_failure(). This code path eventually calls fib_compute_spec_dst()\nwhich dereferences skb->dev. An attempt was made to fix the NULL skb->dev\ndereference in commit 0113d9c9d1cc (\"ipv4: fix null-deref in\nipv4_link_failure\"), but it only addressed the immediate dev_net(skb->dev)\ndereference by using a fallback device. The fix was incomplete because\nfib_compute_spec_dst() later in the call chain still accesses skb->dev\ndirectly, which remains NULL when IPVS calls dst_link_failure().\n\nThe crash occurs when:\n1. IPVS processes a packet in NAT mode with a misconfigured destination\n2. Route lookup fails in __ip_vs_get_out_rt() before establishing a route\n3. The error path calls dst_link_failure(skb) with skb->dev == NULL\n4. ipv4_link_failure() \u2192 ipv4_send_dest_unreach() \u2192\n __ip_options_compile() \u2192 fib_compute_spec_dst()\n5. fib_compute_spec_dst() dereferences NULL skb->dev\n\nApply the same fix used for IPv6 in commit 326bf17ea5d4 (\"ipvs: fix\nipv6 route unreach panic\"): set skb->dev from skb_dst(skb)->dev before\ncalling dst_link_failure().\n\nKASAN: null-ptr-deref in range [0x0000000000000328-0x000000000000032f]\nCPU: 1 PID: 12732 Comm: syz.1.3469 Not tainted 6.6.114 #2\nRIP: 0010:__in_dev_get_rcu include/linux/inetdevice.h:233\nRIP: 0010:fib_compute_spec_dst+0x17a/0x9f0 net/ipv4/fib_frontend.c:285\nCall Trace:\n <TASK>\n spec_dst_fill net/ipv4/ip_options.c:232\n spec_dst_fill net/ipv4/ip_options.c:229\n __ip_options_compile+0x13a1/0x17d0 net/ipv4/ip_options.c:330\n ipv4_send_dest_unreach net/ipv4/route.c:1252\n ipv4_link_failure+0x702/0xb80 net/ipv4/route.c:1265\n dst_link_failure include/net/dst.h:437\n __ip_vs_get_out_rt+0x15fd/0x19e0 net/netfilter/ipvs/ip_vs_xmit.c:412\n ip_vs_nat_xmit+0x1d8/0xc80 net/netfilter/ipvs/ip_vs_xmit.c:764"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nipvs: correcci\u00f3n de desreferencia de puntero nulo ipv4 en la ruta de error de enrutamiento\n\nLa ruta de c\u00f3digo IPv4 en __ip_vs_get_out_rt() llama a dst_link_failure() sin asegurar que skb-&gt;dev est\u00e9 configurado, lo que lleva a una desreferencia de puntero NULO en fib_compute_spec_dst() cuando ipv4_link_failure() intenta enviar mensajes ICMP de destino inalcanzable.\n\nEl problema surgi\u00f3 despu\u00e9s de que el commit ed0de45a1008 ('ipv4: recompilar opciones ip en ipv4_link_failure') comenz\u00f3 a llamar a __ip_options_compile() desde ipv4_link_failure(). Esta ruta de c\u00f3digo finalmente llama a fib_compute_spec_dst() que desreferencia skb-&gt;dev. Se intent\u00f3 corregir la desreferencia de skb-&gt;dev NULO en el commit 0113d9c9d1cc ('ipv4: corregir desreferencia nula en ipv4_link_failure'), pero solo abord\u00f3 la desreferencia inmediata de dev_net(skb-&gt;dev) mediante el uso de un dispositivo de respaldo. La correcci\u00f3n fue incompleta porque fib_compute_spec_dst() m\u00e1s adelante en la cadena de llamadas todav\u00eda accede a skb-&gt;dev directamente, que permanece NULO cuando IPVS llama a dst_link_failure().\n\nEl fallo ocurre cuando:\n1. IPVS procesa un paquete en modo NAT con un destino mal configurado\n2. La b\u00fasqueda de ruta falla en __ip_vs_get_out_rt() antes de establecer una ruta\n3. La ruta de error llama a dst_link_failure(skb) con skb-&gt;dev == NULO\n4. ipv4_link_failure() ? ipv4_send_dest_unreach() ? __ip_options_compile() ? fib_compute_spec_dst()\n5. fib_compute_spec_dst() desreferencia skb-&gt;dev NULO\n\nAplicar la misma correcci\u00f3n utilizada para IPv6 en el commit 326bf17ea5d4 ('ipvs: corregir p\u00e1nico por ruta inalcanzable ipv6'): establecer skb-&gt;dev desde skb_dst(skb)-&gt;dev antes de llamar a dst_link_failure().\n\nKASAN: desreferencia de puntero nulo en el rango [0x0000000000000328-0x000000000000032f]\nCPU: 1 PID: 12732 Comm: syz.1.3469 No contaminado 6.6.114 #2\nRIP: 0010:__in_dev_get_rcu include/linux/inetdevice.h:233\nRIP: 0010:fib_compute_spec_dst+0x17a/0x9f0 net/ipv4/fib_frontend.c:285\nRastro de Llamada:\n \n spec_dst_fill net/ipv4/ip_options.c:232\n spec_dst_fill net/ipv4/ip_options.c:229\n __ip_options_compile+0x13a1/0x17d0 net/ipv4/ip_options.c:330\n ipv4_send_dest_unreach net/ipv4/route.c:1252\n ipv4_link_failure+0x702/0xb80 net/ipv4/route.c:1265\n dst_link_failure include/net/dst.h:437\n __ip_vs_get_out_rt+0x15fd/0x19e0 net/netfilter/ipvs/ip_vs_xmit.c:412\n ip_vs_nat_xmit+0x1d8/0xc80 net/netfilter/ipvs/ip_vs_xmit.c:764"}], "id": "CVE-2025-68813", "lastModified": "2026-04-15T00:35:42.020", "metrics": {}, "published": "2026-01-13T16:16:03.523", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/25ab24df31f7af843c96a38e0781b9165216e1a8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/312d7cd88882fc6cadcc08b02287497aaaf94bcd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4729ff0581fbb7ad098b6153b76b6f5aac94618a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/689a627d14788ad772e0fa24c2e57a23dbc7ce90"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ad891bb3d079a46a821bf2b8867854645191bab0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cdeff10851c37a002d87a035818ebd60fdb74447"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dd72a93c80408f06327dd2d956eb1a656d0b5903"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: ipvs: fix ipv4 null-ptr-deref in route error path", "id": "2429089", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2429089"}, "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": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nipvs: fix ipv4 null-ptr-deref in route error path\nThe IPv4 code path in __ip_vs_get_out_rt() calls dst_link_failure()\nwithout ensuring skb->dev is set, leading to a NULL pointer dereference\nin fib_compute_spec_dst() when ipv4_link_failure() attempts to send\nICMP destination unreachable messages.\nThe issue emerged after commit ed0de45a1008 (\"ipv4: recompile ip options\nin ipv4_link_failure\") started calling __ip_options_compile() from\nipv4_link_failure(). This code path eventually calls fib_compute_spec_dst()\nwhich dereferences skb->dev. An attempt was made to fix the NULL skb->dev\ndereference in commit 0113d9c9d1cc (\"ipv4: fix null-deref in\nipv4_link_failure\"), but it only addressed the immediate dev_net(skb->dev)\ndereference by using a fallback device. The fix was incomplete because\nfib_compute_spec_dst() later in the call chain still accesses skb->dev\ndirectly, which remains NULL when IPVS calls dst_link_failure().\nThe crash occurs when:\n1. IPVS processes a packet in NAT mode with a misconfigured destination\n2. Route lookup fails in __ip_vs_get_out_rt() before establishing a route\n3. The error path calls dst_link_failure(skb) with skb->dev == NULL\n4. ipv4_link_failure() \u2192 ipv4_send_dest_unreach() \u2192\n__ip_options_compile() \u2192 fib_compute_spec_dst()\n5. fib_compute_spec_dst() dereferences NULL skb->dev\nApply the same fix used for IPv6 in commit 326bf17ea5d4 (\"ipvs: fix\nipv6 route unreach panic\"): set skb->dev from skb_dst(skb)->dev before\ncalling dst_link_failure().\nKASAN: null-ptr-deref in range [0x0000000000000328-0x000000000000032f]\nCPU: 1 PID: 12732 Comm: syz.1.3469 Not tainted 6.6.114 #2\nRIP: 0010:__in_dev_get_rcu include/linux/inetdevice.h:233\nRIP: 0010:fib_compute_spec_dst+0x17a/0x9f0 net/ipv4/fib_frontend.c:285\nCall Trace:\n<TASK>\nspec_dst_fill net/ipv4/ip_options.c:232\nspec_dst_fill net/ipv4/ip_options.c:229\n__ip_options_compile+0x13a1/0x17d0 net/ipv4/ip_options.c:330\nipv4_send_dest_unreach net/ipv4/route.c:1252\nipv4_link_failure+0x702/0xb80 net/ipv4/route.c:1265\ndst_link_failure include/net/dst.h:437\n__ip_vs_get_out_rt+0x15fd/0x19e0 net/netfilter/ipvs/ip_vs_xmit.c:412\nip_vs_nat_xmit+0x1d8/0xc80 net/netfilter/ipvs/ip_vs_xmit.c:764"], "name": "CVE-2025-68813", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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": "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-01-13T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-68813\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-68813\nhttps://lore.kernel.org/linux-cve-announce/2026011312-CVE-2025-68813-13a5@gregkh/T"], "threat_severity": "Low"}

{}