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CVE-2026-43402

In the Linux kernel, the following vulnerability has been resolved: kthread: consolidate kthread exit paths to prevent use-after-free Guillaume reported crashes via corrupted RCU callback function pointers during KUnit testing. The crash was traced back to the pidfs rhashtable conversion which replaced the 24-byte rb_node with an 8-byte rhash_head in struct pid, shrinking it from 160 to 144 bytes. struct kthread (without CONFIG_BLK_CGROUP) is also 144 bytes. With CONFIG_SLAB_MERGE_DEFAULT and
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:9ee4859b1dde6990db74491bf342521f1ba0793f10b02c7d90af3a14368701bf
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":["include/linux/kthread.h","kernel/exit.c","kernel/kthread.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.14"},{"lessThan":"6.14","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.19","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versio…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a29680f20b79d4ea4eedec4cbc0294dd1d91dc6fde95bcf96b4418ff4c1881b2 · sha256:59ae20d1c20d1a03… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/linux/kthread.h","kernel/exit.c","kernel/kthread.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"4729c7b00a347fd37d0cbc265b85f2884c3e06b6","status":"affected","version":"4d13f4304fa43471bfea101658a11feec7b28ac0","versionType":"git"},{"lessThan":"5a591d7a5e48d30100943940a30a6ab41b15c672","status":"affected","version":"4d13f4304fa43471bfea101658a11feec7b28ac0","versionType":"git"},{"lessThan":"28aaa9c39945b7925a1cc1d513c8f21ed38f5e4f","status":"affected…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a29680f20b79d4ea4eedec4cbc0294dd1d91dc6fde95bcf96b4418ff4c1881b2 · sha256:59ae20d1c20d1a03… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["include/linux/kthread.h","kernel/exit.c","kernel/kthread.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.14"},{"lessThan":"6.14","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.19","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versio…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a29680f20b79d4ea4eedec4cbc0294dd1d91dc6fde95bcf96b4418ff4c1881b2 · sha256:59ae20d1c20d1a03… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/linux/kthread.h","kernel/exit.c","kernel/kthread.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"4729c7b00a347fd37d0cbc265b85f2884c3e06b6","status":"affected","version":"4d13f4304fa43471bfea101658a11feec7b28ac0","versionType":"git"},{"lessThan":"5a591d7a5e48d30100943940a30a6ab41b15c672","status":"affected","version":"4d13f4304fa43471bfea101658a11feec7b28ac0","versionType":"git"},{"lessThan":"28aaa9c39945b7925a1cc1d513c8f21ed38f5e4f","status":"affected…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a29680f20b79d4ea4eedec4cbc0294dd1d91dc6fde95bcf96b4418ff4c1881b2 · sha256:59ae20d1c20d1a03… · /containers/cna/affected/0

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:a29680f20b79d4ea4eedec4cbc0294dd1d91dc6fde95bcf96b4418ff4c1881b2 · sha256:59ae20d1c20d1a03… · /containers/cna/metrics/0/cvssV3_1

Source references

3 source assertions
{"url":"https://git.kernel.org/stable/c/28aaa9c39945b7925a1cc1d513c8f21ed38f5e4f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a29680f20b79d4ea4eedec4cbc0294dd1d91dc6fde95bcf96b4418ff4c1881b2 · sha256:59ae20d1c20d1a03… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/4729c7b00a347fd37d0cbc265b85f2884c3e06b6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a29680f20b79d4ea4eedec4cbc0294dd1d91dc6fde95bcf96b4418ff4c1881b2 · sha256:59ae20d1c20d1a03… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/5a591d7a5e48d30100943940a30a6ab41b15c672"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a29680f20b79d4ea4eedec4cbc0294dd1d91dc6fde95bcf96b4418ff4c1881b2 · sha256:59ae20d1c20d1a03… · /containers/cna/references/1

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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