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CVE-2026-31531

In the Linux kernel, the following vulnerability has been resolved: ipv4: nexthop: allocate skb dynamically in rtm_get_nexthop() When querying a nexthop object via RTM_GETNEXTHOP, the kernel currently allocates a fixed-size skb using NLMSG_GOODSIZE. While sufficient for single nexthops and small Equal-Cost Multi-Path groups, this fixed allocation fails for large nexthop groups like 512 nexthops. This results in the following warning splat: WARNING: net/ipv4/nexthop.c:3395 at rtm_get_nexthop
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:757053c21ec3634fd55fe5cc6a74e5f0f4db2f12106f7f72ffd606146c388836
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv4/nexthop.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"615517f3f8d53b0cf41507c7599971e17adfdfa5","status":"affected","version":"430a049190de3c9e219f43084de9f1122da04570","versionType":"git"},{"lessThan":"40bd39e383a0478fd5c221f393df05fd9d70cfbc","status":"affected","version":"430a049190de3c9e219f43084de9f1122da04570","versionType":"git"},{"lessThan":"635038fe19db391117e66b46bdc2b6e447ac801d","status":"affected","version":"430a049190de3c9e219f43084de…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:36e586010d5e0bf2e42035533d83acc298731886bd679d54b18c34cf664da868 · sha256:381f158fb3ce24ab… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv4/nexthop.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.3"},{"lessThan":"5.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.83","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.24","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.14","versionType":"semver"},{"lessThanOrEqu…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:36e586010d5e0bf2e42035533d83acc298731886bd679d54b18c34cf664da868 · sha256:381f158fb3ce24ab… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv4/nexthop.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"615517f3f8d53b0cf41507c7599971e17adfdfa5","status":"affected","version":"430a049190de3c9e219f43084de9f1122da04570","versionType":"git"},{"lessThan":"40bd39e383a0478fd5c221f393df05fd9d70cfbc","status":"affected","version":"430a049190de3c9e219f43084de9f1122da04570","versionType":"git"},{"lessThan":"635038fe19db391117e66b46bdc2b6e447ac801d","status":"affected","version":"430a049190de3c9e219f43084de…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:36e586010d5e0bf2e42035533d83acc298731886bd679d54b18c34cf664da868 · sha256:381f158fb3ce24ab… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv4/nexthop.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.3"},{"lessThan":"5.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.83","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.24","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.14","versionType":"semver"},{"lessThanOrEqu…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:36e586010d5e0bf2e42035533d83acc298731886bd679d54b18c34cf664da868 · sha256:381f158fb3ce24ab… · /containers/cna/affected/1

Source references

4 source assertions
{"url":"https://git.kernel.org/stable/c/14cf0cd35361f4e94824bf8a42f72713d7702a73"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:36e586010d5e0bf2e42035533d83acc298731886bd679d54b18c34cf664da868 · sha256:381f158fb3ce24ab… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/40bd39e383a0478fd5c221f393df05fd9d70cfbc"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:36e586010d5e0bf2e42035533d83acc298731886bd679d54b18c34cf664da868 · sha256:381f158fb3ce24ab… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/615517f3f8d53b0cf41507c7599971e17adfdfa5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:36e586010d5e0bf2e42035533d83acc298731886bd679d54b18c34cf664da868 · sha256:381f158fb3ce24ab… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/635038fe19db391117e66b46bdc2b6e447ac801d"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:36e586010d5e0bf2e42035533d83acc298731886bd679d54b18c34cf664da868 · sha256:381f158fb3ce24ab… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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