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CVE-2026-43080

In the Linux kernel, the following vulnerability has been resolved: l2tp: Drop large packets with UDP encap syzbot reported a WARN on my patch series [1]. The actual issue is an overflow of 16-bit UDP length field, and it exists in the upstream code. My series added a debug WARN with an overflow check that exposed the issue, that's why syzbot tripped on my patches, rather than on upstream code. syzbot's repro: r0 = socket$pppl2tp(0x18, 0x1, 0x1) r1 = socket$inet6_udp(0xa, 0x2, 0x0) connect$i
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:48c548ad0b0982bb281bd97ae5961a7b27db1a44210c04edb28eec7a253650e6
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/l2tp/l2tp_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"02d787fd0922c71c0264449fe82d35983613e4e5","status":"affected","version":"3557baabf28088f49bdf72a048fd33ab62e205b1","versionType":"git"},{"lessThan":"c2994fd24997ed63d713c03313f863645adb4d6c","status":"affected","version":"3557baabf28088f49bdf72a048fd33ab62e205b1","versionType":"git"},{"lessThan":"a42452db035577e150ffd9adf98c56fef9fb9408","status":"affected","version":"3557baabf28088f49bdf72a04…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:37526ff41667bd798db1278181d0aae8d33de2bcb47e9953f89baf98f224219a · sha256:6b4affdb564a7999… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["net/l2tp/l2tp_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.23"},{"lessThan":"2.6.23","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.258","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.209","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","versionType":"semver"},{"less…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:37526ff41667bd798db1278181d0aae8d33de2bcb47e9953f89baf98f224219a · sha256:6b4affdb564a7999… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/l2tp/l2tp_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"02d787fd0922c71c0264449fe82d35983613e4e5","status":"affected","version":"3557baabf28088f49bdf72a048fd33ab62e205b1","versionType":"git"},{"lessThan":"c2994fd24997ed63d713c03313f863645adb4d6c","status":"affected","version":"3557baabf28088f49bdf72a048fd33ab62e205b1","versionType":"git"},{"lessThan":"a42452db035577e150ffd9adf98c56fef9fb9408","status":"affected","version":"3557baabf28088f49bdf72a04…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:37526ff41667bd798db1278181d0aae8d33de2bcb47e9953f89baf98f224219a · sha256:6b4affdb564a7999… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["net/l2tp/l2tp_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.23"},{"lessThan":"2.6.23","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.258","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.209","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","versionType":"semver"},{"less…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:37526ff41667bd798db1278181d0aae8d33de2bcb47e9953f89baf98f224219a · sha256:6b4affdb564a7999… · /containers/cna/affected/1

Source references

8 source assertions
{"url":"https://git.kernel.org/stable/c/02d787fd0922c71c0264449fe82d35983613e4e5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:37526ff41667bd798db1278181d0aae8d33de2bcb47e9953f89baf98f224219a · sha256:6b4affdb564a7999… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/77c1489398c85a844f90205f5e76fd6bc8bb4089"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:37526ff41667bd798db1278181d0aae8d33de2bcb47e9953f89baf98f224219a · sha256:6b4affdb564a7999… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/86534c97abd6365a9a021fd767a2023e63c44469"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:37526ff41667bd798db1278181d0aae8d33de2bcb47e9953f89baf98f224219a · sha256:6b4affdb564a7999… · /containers/cna/references/5
{"url":"https://git.kernel.org/stable/c/9ccce02d501335f59a02f26c878c5e095b16302f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:37526ff41667bd798db1278181d0aae8d33de2bcb47e9953f89baf98f224219a · sha256:6b4affdb564a7999… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/a42452db035577e150ffd9adf98c56fef9fb9408"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:37526ff41667bd798db1278181d0aae8d33de2bcb47e9953f89baf98f224219a · sha256:6b4affdb564a7999… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/c2994fd24997ed63d713c03313f863645adb4d6c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:37526ff41667bd798db1278181d0aae8d33de2bcb47e9953f89baf98f224219a · sha256:6b4affdb564a7999… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/ebe560ea5f54134279356703e73b7f867c89db13"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:37526ff41667bd798db1278181d0aae8d33de2bcb47e9953f89baf98f224219a · sha256:6b4affdb564a7999… · /containers/cna/references/7
{"url":"https://git.kernel.org/stable/c/f295fe86e22ff0a2ecebf05e30a387e5cf6f6ddc"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:37526ff41667bd798db1278181d0aae8d33de2bcb47e9953f89baf98f224219a · sha256:6b4affdb564a7999… · /containers/cna/references/6

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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