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CVE-2026-64422

In the Linux kernel, the following vulnerability has been resolved: net: ipv4: bound TCP reordering sysctl writes and MTU probe sizes Reject invalid `net.ipv4.tcp_reordering` values before they reach TCP socket state. The sysctl is stored as an `int` but copied into the `u32` `tp->reordering` field for new sockets, so negative writes wrap to large values. With `tcp_mtu_probing=2`, the wrapped value can overflow the `tcp_mtu_probe()` size calculation and drive the MTU probing path into an out-
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:5a8568ef53887fa07241c21c0abc915f93746a31e24bdeb99df7d1ddb290d51d
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":"affected","product":"Linux","programFiles":["net/ipv4/sysctl_net_ipv4.c","net/ipv4/tcp_output.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.24"},{"lessThan":"2.6.24","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.261","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.212","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178",…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5e6ea5e9a4714f98b1b387a1885cf4e9b2f9df13aae4d047fcc12947f01edc9e · sha256:04e0441b45f1c12b… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv4/sysctl_net_ipv4.c","net/ipv4/tcp_output.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"f0d88a4cd03affff6c08adf6c63964e235aede43","status":"affected","version":"91cc17c0e5e5ada156a8d5787a2509d263ea6bbf","versionType":"git"},{"lessThan":"27ddf4486c7dbf5bdd393fa8bef6b67179796d98","status":"affected","version":"91cc17c0e5e5ada156a8d5787a2509d263ea6bbf","versionType":"git"},{"lessThan":"782708ca1ea1f68b8cbb5ea3a7f5f18d0000efae","status":"affected","versi…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5e6ea5e9a4714f98b1b387a1885cf4e9b2f9df13aae4d047fcc12947f01edc9e · sha256:04e0441b45f1c12b… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv4/sysctl_net_ipv4.c","net/ipv4/tcp_output.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.24"},{"lessThan":"2.6.24","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.261","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.212","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178",…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5e6ea5e9a4714f98b1b387a1885cf4e9b2f9df13aae4d047fcc12947f01edc9e · sha256:04e0441b45f1c12b… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv4/sysctl_net_ipv4.c","net/ipv4/tcp_output.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"f0d88a4cd03affff6c08adf6c63964e235aede43","status":"affected","version":"91cc17c0e5e5ada156a8d5787a2509d263ea6bbf","versionType":"git"},{"lessThan":"27ddf4486c7dbf5bdd393fa8bef6b67179796d98","status":"affected","version":"91cc17c0e5e5ada156a8d5787a2509d263ea6bbf","versionType":"git"},{"lessThan":"782708ca1ea1f68b8cbb5ea3a7f5f18d0000efae","status":"affected","versi…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5e6ea5e9a4714f98b1b387a1885cf4e9b2f9df13aae4d047fcc12947f01edc9e · sha256:04e0441b45f1c12b… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:5e6ea5e9a4714f98b1b387a1885cf4e9b2f9df13aae4d047fcc12947f01edc9e · sha256:04e0441b45f1c12b… · /containers/cna/metrics/0/cvssV3_1

Source references

8 source assertions
{"url":"https://git.kernel.org/stable/c/27ddf4486c7dbf5bdd393fa8bef6b67179796d98"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5e6ea5e9a4714f98b1b387a1885cf4e9b2f9df13aae4d047fcc12947f01edc9e · sha256:04e0441b45f1c12b… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/782708ca1ea1f68b8cbb5ea3a7f5f18d0000efae"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5e6ea5e9a4714f98b1b387a1885cf4e9b2f9df13aae4d047fcc12947f01edc9e · sha256:04e0441b45f1c12b… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/99206ce2244f8a3ed64298d0667c9055845a5dc7"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5e6ea5e9a4714f98b1b387a1885cf4e9b2f9df13aae4d047fcc12947f01edc9e · sha256:04e0441b45f1c12b… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/a094ac95d3b69adfa1676eb9c8eae6835d4f1671"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5e6ea5e9a4714f98b1b387a1885cf4e9b2f9df13aae4d047fcc12947f01edc9e · sha256:04e0441b45f1c12b… · /containers/cna/references/6
{"url":"https://git.kernel.org/stable/c/bbae351c0f32f7c200249e4aa6561b2b419dcf69"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5e6ea5e9a4714f98b1b387a1885cf4e9b2f9df13aae4d047fcc12947f01edc9e · sha256:04e0441b45f1c12b… · /containers/cna/references/5
{"url":"https://git.kernel.org/stable/c/e81f805824a8109504fce090641b17d135b48cd1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5e6ea5e9a4714f98b1b387a1885cf4e9b2f9df13aae4d047fcc12947f01edc9e · sha256:04e0441b45f1c12b… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/efb8763d7bbb40cff4cc55a6b62c3095a038149c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5e6ea5e9a4714f98b1b387a1885cf4e9b2f9df13aae4d047fcc12947f01edc9e · sha256:04e0441b45f1c12b… · /containers/cna/references/7
{"url":"https://git.kernel.org/stable/c/f0d88a4cd03affff6c08adf6c63964e235aede43"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5e6ea5e9a4714f98b1b387a1885cf4e9b2f9df13aae4d047fcc12947f01edc9e · sha256:04e0441b45f1c12b… · /containers/cna/references/0

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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