CVE-2025-68813 (GCVE-0-2025-68813)
Vulnerability from cvelistv5 – Published: 2026-01-13 15:29 – Updated: 2026-06-16 19:15
VLAI
EPSS
VEX
Title
ipvs: fix ipv4 null-ptr-deref in route error path
Summary
In the Linux kernel, the following vulnerability has been resolved:
ipvs: fix ipv4 null-ptr-deref in route error path
The IPv4 code path in __ip_vs_get_out_rt() calls dst_link_failure()
without ensuring skb->dev is set, leading to a NULL pointer dereference
in fib_compute_spec_dst() when ipv4_link_failure() attempts to send
ICMP destination unreachable messages.
The issue emerged after commit ed0de45a1008 ("ipv4: recompile ip options
in ipv4_link_failure") started calling __ip_options_compile() from
ipv4_link_failure(). This code path eventually calls fib_compute_spec_dst()
which dereferences skb->dev. An attempt was made to fix the NULL skb->dev
dereference in commit 0113d9c9d1cc ("ipv4: fix null-deref in
ipv4_link_failure"), but it only addressed the immediate dev_net(skb->dev)
dereference by using a fallback device. The fix was incomplete because
fib_compute_spec_dst() later in the call chain still accesses skb->dev
directly, which remains NULL when IPVS calls dst_link_failure().
The crash occurs when:
1. IPVS processes a packet in NAT mode with a misconfigured destination
2. Route lookup fails in __ip_vs_get_out_rt() before establishing a route
3. The error path calls dst_link_failure(skb) with skb->dev == NULL
4. ipv4_link_failure() → ipv4_send_dest_unreach() →
__ip_options_compile() → fib_compute_spec_dst()
5. fib_compute_spec_dst() dereferences NULL skb->dev
Apply the same fix used for IPv6 in commit 326bf17ea5d4 ("ipvs: fix
ipv6 route unreach panic"): set skb->dev from skb_dst(skb)->dev before
calling dst_link_failure().
KASAN: null-ptr-deref in range [0x0000000000000328-0x000000000000032f]
CPU: 1 PID: 12732 Comm: syz.1.3469 Not tainted 6.6.114 #2
RIP: 0010:__in_dev_get_rcu include/linux/inetdevice.h:233
RIP: 0010:fib_compute_spec_dst+0x17a/0x9f0 net/ipv4/fib_frontend.c:285
Call Trace:
<TASK>
spec_dst_fill net/ipv4/ip_options.c:232
spec_dst_fill net/ipv4/ip_options.c:229
__ip_options_compile+0x13a1/0x17d0 net/ipv4/ip_options.c:330
ipv4_send_dest_unreach net/ipv4/route.c:1252
ipv4_link_failure+0x702/0xb80 net/ipv4/route.c:1265
dst_link_failure include/net/dst.h:437
__ip_vs_get_out_rt+0x15fd/0x19e0 net/netfilter/ipvs/ip_vs_xmit.c:412
ip_vs_nat_xmit+0x1d8/0xc80 net/netfilter/ipvs/ip_vs_xmit.c:764
Severity
No CVSS data available.
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 19:15 UTC
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
ed0de45a1008991fdaa27a0152befcb74d126a8b , < dd72a93c80408f06327dd2d956eb1a656d0b5903
(git)
Affected: ed0de45a1008991fdaa27a0152befcb74d126a8b , < 312d7cd88882fc6cadcc08b02287497aaaf94bcd (git) Affected: ed0de45a1008991fdaa27a0152befcb74d126a8b , < cdeff10851c37a002d87a035818ebd60fdb74447 (git) Affected: ed0de45a1008991fdaa27a0152befcb74d126a8b , < 4729ff0581fbb7ad098b6153b76b6f5aac94618a (git) Affected: ed0de45a1008991fdaa27a0152befcb74d126a8b , < 25ab24df31f7af843c96a38e0781b9165216e1a8 (git) Affected: ed0de45a1008991fdaa27a0152befcb74d126a8b , < 689a627d14788ad772e0fa24c2e57a23dbc7ce90 (git) Affected: ed0de45a1008991fdaa27a0152befcb74d126a8b , < ad891bb3d079a46a821bf2b8867854645191bab0 (git) Affected: 6c2fa855d8178699706b1192db2f1f8102b0ba1e (git) Affected: fbf569d2beee2a4a7a0bc8b619c26101d1211a88 (git) Affected: ff71f99d5fb2daf54340e8b290d0bc4e6b4c1d38 (git) Affected: 3d988fcddbe7b8673a231958bd2fba61b5a7ced9 (git) Affected: 8a430e56a6485267a1b2d3747209d26c54d1a34b (git) Affected: 6bd1ee0a993fc9574ae43c1994c54a60cb23a380 (git) Affected: 3.18.139 , < 3.19 (semver) Affected: 4.4.179 , < 4.5 (semver) Affected: 4.9.171 , < 4.10 (semver) Affected: 4.14.114 , < 4.15 (semver) Affected: 4.19.37 , < 4.20 (semver) Affected: 5.0.10 , < 5.1 (semver) |
guessed | |
| Linux | Linux |
Affected:
5.1
Unaffected: 0 , < 5.1 (semver) Unaffected: 5.10.248 , ≤ 5.10.* (semver) Unaffected: 5.15.198 , ≤ 5.15.* (semver) Unaffected: 6.1.160 , ≤ 6.1.* (semver) Unaffected: 6.6.120 , ≤ 6.6.* (semver) Unaffected: 6.12.64 , ≤ 6.12.* (semver) Unaffected: 6.18.3 , ≤ 6.18.* (semver) Unaffected: 6.19 , ≤ * (original_commit_for_fix) |
guessed |
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"nvd": "{\"cve\":{\"id\":\"CVE-2025-68813\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-13T16:16:03.523\",\"lastModified\":\"2026-06-17T09:59:39.577\",\"vulnStatus\":\"Deferred\",\"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-\u003edev 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-\u003edev. An attempt was made to fix the NULL skb-\u003edev\\ndereference in commit 0113d9c9d1cc (\\\"ipv4: fix null-deref in\\nipv4_link_failure\\\"), but it only addressed the immediate dev_net(skb-\u003edev)\\ndereference by using a fallback device. The fix was incomplete because\\nfib_compute_spec_dst() later in the call chain still accesses skb-\u003edev\\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-\u003edev == 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-\u003edev\\n\\nApply the same fix used for IPv6 in commit 326bf17ea5d4 (\\\"ipvs: fix\\nipv6 route unreach panic\\\"): set skb-\u003edev from skb_dst(skb)-\u003edev 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 \u003cTASK\u003e\\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-\u0026gt;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 (\u0027ipv4: recompilar opciones ip en ipv4_link_failure\u0027) 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-\u0026gt;dev. Se intent\u00f3 corregir la desreferencia de skb-\u0026gt;dev NULO en el commit 0113d9c9d1cc (\u0027ipv4: corregir desreferencia nula en ipv4_link_failure\u0027), pero solo abord\u00f3 la desreferencia inmediata de dev_net(skb-\u0026gt;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-\u0026gt;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-\u0026gt;dev == NULO\\n4. ipv4_link_failure() ? ipv4_send_dest_unreach() ? __ip_options_compile() ? fib_compute_spec_dst()\\n5. fib_compute_spec_dst() desreferencia skb-\u0026gt;dev NULO\\n\\nAplicar la misma correcci\u00f3n utilizada para IPv6 en el commit 326bf17ea5d4 (\u0027ipvs: corregir p\u00e1nico por ruta inalcanzable ipv6\u0027): establecer skb-\u0026gt;dev desde skb_dst(skb)-\u0026gt;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\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/netfilter/ipvs/ip_vs_xmit.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"ed0de45a1008991fdaa27a0152befcb74d126a8b\",\"lessThan\":\"dd72a93c80408f06327dd2d956eb1a656d0b5903\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed0de45a1008991fdaa27a0152befcb74d126a8b\",\"lessThan\":\"312d7cd88882fc6cadcc08b02287497aaaf94bcd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed0de45a1008991fdaa27a0152befcb74d126a8b\",\"lessThan\":\"cdeff10851c37a002d87a035818ebd60fdb74447\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed0de45a1008991fdaa27a0152befcb74d126a8b\",\"lessThan\":\"4729ff0581fbb7ad098b6153b76b6f5aac94618a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed0de45a1008991fdaa27a0152befcb74d126a8b\",\"lessThan\":\"25ab24df31f7af843c96a38e0781b9165216e1a8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed0de45a1008991fdaa27a0152befcb74d126a8b\",\"lessThan\":\"689a627d14788ad772e0fa24c2e57a23dbc7ce90\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed0de45a1008991fdaa27a0152befcb74d126a8b\",\"lessThan\":\"ad891bb3d079a46a821bf2b8867854645191bab0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6c2fa855d8178699706b1192db2f1f8102b0ba1e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"fbf569d2beee2a4a7a0bc8b619c26101d1211a88\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ff71f99d5fb2daf54340e8b290d0bc4e6b4c1d38\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3d988fcddbe7b8673a231958bd2fba61b5a7ced9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8a430e56a6485267a1b2d3747209d26c54d1a34b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6bd1ee0a993fc9574ae43c1994c54a60cb23a380\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3.18.139\",\"lessThan\":\"3.19\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.4.179\",\"lessThan\":\"4.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.9.171\",\"lessThan\":\"4.10\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.14.114\",\"lessThan\":\"4.15\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.19.37\",\"lessThan\":\"4.20\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.0.10\",\"lessThan\":\"5.1\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/netfilter/ipvs/ip_vs_xmit.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.1\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.1\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.248\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.198\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.160\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.120\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.64\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.3\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-06-16T19:15:40.029608Z\",\"id\":\"CVE-2025-68813\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-06-28T10:59:11+00:00",
"cve": "CVE-2025-68813",
"id": "CVE-2025-68813",
"initial_release_date": "2025-01-01T00:00:00+00:00",
"product_status:known_affected": "246",
"product_status:known_not_affected": "28",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: ipvs: fix ipv4 null-ptr-deref in route error path",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68813.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-08-29T01:11:43Z",
"cve": "CVE-2025-68813",
"id": "CVE-2025-68813",
"initial_release_date": "2026-01-15T00:25:45Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "488",
"product_status:known_not_affected": "34",
"product_status:recommended": "732",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2025-68813",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-68813.json",
"version": "51"
},
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-68813\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-16T19:15:40.029608Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-16T19:15:45.881Z\"}}], \"cna\": {\"title\": \"ipvs: fix ipv4 null-ptr-deref in route error path\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"ed0de45a1008991fdaa27a0152befcb74d126a8b\", \"lessThan\": \"dd72a93c80408f06327dd2d956eb1a656d0b5903\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ed0de45a1008991fdaa27a0152befcb74d126a8b\", \"lessThan\": \"312d7cd88882fc6cadcc08b02287497aaaf94bcd\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ed0de45a1008991fdaa27a0152befcb74d126a8b\", \"lessThan\": \"cdeff10851c37a002d87a035818ebd60fdb74447\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ed0de45a1008991fdaa27a0152befcb74d126a8b\", \"lessThan\": \"4729ff0581fbb7ad098b6153b76b6f5aac94618a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ed0de45a1008991fdaa27a0152befcb74d126a8b\", \"lessThan\": \"25ab24df31f7af843c96a38e0781b9165216e1a8\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ed0de45a1008991fdaa27a0152befcb74d126a8b\", \"lessThan\": \"689a627d14788ad772e0fa24c2e57a23dbc7ce90\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ed0de45a1008991fdaa27a0152befcb74d126a8b\", \"lessThan\": \"ad891bb3d079a46a821bf2b8867854645191bab0\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6c2fa855d8178699706b1192db2f1f8102b0ba1e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"fbf569d2beee2a4a7a0bc8b619c26101d1211a88\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ff71f99d5fb2daf54340e8b290d0bc4e6b4c1d38\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3d988fcddbe7b8673a231958bd2fba61b5a7ced9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8a430e56a6485267a1b2d3747209d26c54d1a34b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6bd1ee0a993fc9574ae43c1994c54a60cb23a380\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3.18.139\", \"lessThan\": \"3.19\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"4.4.179\", \"lessThan\": \"4.5\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"4.9.171\", \"lessThan\": \"4.10\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"4.14.114\", \"lessThan\": \"4.15\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"4.19.37\", \"lessThan\": \"4.20\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.0.10\", \"lessThan\": \"5.1\", \"versionType\": \"semver\"}], \"programFiles\": [\"net/netfilter/ipvs/ip_vs_xmit.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.1\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.1\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.248\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.198\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.160\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.120\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.64\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.18.*\"}, {\"status\": \"unaffected\", \"version\": \"6.19\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/netfilter/ipvs/ip_vs_xmit.c\"], \"defaultStatus\": \"affected\"}], \"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\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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-\u003edev 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-\u003edev. An attempt was made to fix the NULL skb-\u003edev\\ndereference in commit 0113d9c9d1cc (\\\"ipv4: fix null-deref in\\nipv4_link_failure\\\"), but it only addressed the immediate dev_net(skb-\u003edev)\\ndereference by using a fallback device. The fix was incomplete because\\nfib_compute_spec_dst() later in the call chain still accesses skb-\u003edev\\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-\u003edev == 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-\u003edev\\n\\nApply the same fix used for IPv6 in commit 326bf17ea5d4 (\\\"ipvs: fix\\nipv6 route unreach panic\\\"): set skb-\u003edev from skb_dst(skb)-\u003edev 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 \u003cTASK\u003e\\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\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.248\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.198\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.160\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.120\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.64\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.3\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.19\", \"versionStartIncluding\": \"5.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"3.18.139\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.4.179\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.9.171\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.14.114\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.19.37\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.0.10\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-23T16:02:55.189Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2025-68813\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-16T19:15:49.825Z\", \"dateReserved\": \"2025-12-24T10:30:51.047Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2026-01-13T15:29:18.483Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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