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CVE-2026-53260

In the Linux kernel, the following vulnerability has been resolved: tcp: Add preempt_{disable,enable}_nested() in reqsk_queue_hash_req(). syzbot reported a weird reqsk->rsk_refcnt underflow in __inet_csk_reqsk_queue_drop(). The captured reqsk_put() in __inet_csk_reqsk_queue_drop() is called only when it successfully removes reqsk from ehash. Moreover, reqsk_timer_handler() calls another reqsk_put() after that. This indicates that the reqsk was missing both refcnts for ehash and the timer it
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:4a50529366877889dab4379264572410f2971db0b38050eb88cd35eb073c704b
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/inet_connection_sock.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"889fc99967007e2493833515a645cb2d800f6742","status":"affected","version":"d2d6422f8bd17c6bb205133e290625a564194496","versionType":"git"},{"lessThan":"de5a46f3b2c8d3cd20afa158bd3a725e3e3d6fd3","status":"affected","version":"d2d6422f8bd17c6bb205133e290625a564194496","versionType":"git"},{"lessThan":"b183215ff714efb747d9d5a429322ba6404b5401","status":"affected","version":"d2d6422f8bd17c…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b14d049cf60b906f6c6657348d07c93cec1bb288b26eb19e3dff921a15f13f14 · sha256:47229c0d6fa4fde2… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv4/inet_connection_sock.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.12"},{"lessThan":"6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.13","versionType":"semver"},{"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b14d049cf60b906f6c6657348d07c93cec1bb288b26eb19e3dff921a15f13f14 · sha256:47229c0d6fa4fde2… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv4/inet_connection_sock.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"889fc99967007e2493833515a645cb2d800f6742","status":"affected","version":"d2d6422f8bd17c6bb205133e290625a564194496","versionType":"git"},{"lessThan":"de5a46f3b2c8d3cd20afa158bd3a725e3e3d6fd3","status":"affected","version":"d2d6422f8bd17c6bb205133e290625a564194496","versionType":"git"},{"lessThan":"b183215ff714efb747d9d5a429322ba6404b5401","status":"affected","version":"d2d6422f8bd17c…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b14d049cf60b906f6c6657348d07c93cec1bb288b26eb19e3dff921a15f13f14 · sha256:47229c0d6fa4fde2… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv4/inet_connection_sock.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.12"},{"lessThan":"6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.13","versionType":"semver"},{"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b14d049cf60b906f6c6657348d07c93cec1bb288b26eb19e3dff921a15f13f14 · sha256:47229c0d6fa4fde2… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":9.8,"baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:b14d049cf60b906f6c6657348d07c93cec1bb288b26eb19e3dff921a15f13f14 · sha256:47229c0d6fa4fde2… · /containers/cna/metrics/0/cvssV3_1

Source references

4 source assertions
{"url":"https://git.kernel.org/stable/c/889fc99967007e2493833515a645cb2d800f6742"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b14d049cf60b906f6c6657348d07c93cec1bb288b26eb19e3dff921a15f13f14 · sha256:47229c0d6fa4fde2… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/b183215ff714efb747d9d5a429322ba6404b5401"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b14d049cf60b906f6c6657348d07c93cec1bb288b26eb19e3dff921a15f13f14 · sha256:47229c0d6fa4fde2… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/de5a46f3b2c8d3cd20afa158bd3a725e3e3d6fd3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b14d049cf60b906f6c6657348d07c93cec1bb288b26eb19e3dff921a15f13f14 · sha256:47229c0d6fa4fde2… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/e10902df24488ca722303133acfc82490f7d59ad"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b14d049cf60b906f6c6657348d07c93cec1bb288b26eb19e3dff921a15f13f14 · sha256:47229c0d6fa4fde2… · /containers/cna/references/3

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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