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CVE-2026-63799

In the Linux kernel, the following vulnerability has been resolved: sched/mmcid: Fix OOB clear_bit when CID is MM_CID_UNSET in fixup path In mm_cid_fixup_cpus_to_tasks(), when rq->curr has the target mm and mm_cid.active is set, the CID is checked with cid_in_transit() before setting the transition bit. In per-CPU mode a newly forked or exec'd task can be running with mm_cid.cid == MM_CID_UNSET because CIDs are assigned lazily on schedule-in. With cid_in_transit() the guard passes for MM_CID
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:43b166d685f5a880080aad5861a3eb07d6f41760d5fa55c4eb5375c860d12f44
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":["kernel/sched/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8d32856fb72ba976d9c87ba405fd17e80419934c","status":"affected","version":"fbd0e71dc370af73f6b316e4de9eed273dd90340","versionType":"git"},{"lessThan":"de3ab9bd3133899efb92e4cd05ba4203e58fc0a3","status":"affected","version":"fbd0e71dc370af73f6b316e4de9eed273dd90340","versionType":"git"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b9b51156cd3db79f8892f30719db8653102a1560e0f2fbe31bca6f9a212bb16e · sha256:05b96fb8839a7e7c… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/sched/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.19"},{"lessThan":"6.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.3","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b9b51156cd3db79f8892f30719db8653102a1560e0f2fbe31bca6f9a212bb16e · sha256:05b96fb8839a7e7c… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["kernel/sched/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8d32856fb72ba976d9c87ba405fd17e80419934c","status":"affected","version":"fbd0e71dc370af73f6b316e4de9eed273dd90340","versionType":"git"},{"lessThan":"de3ab9bd3133899efb92e4cd05ba4203e58fc0a3","status":"affected","version":"fbd0e71dc370af73f6b316e4de9eed273dd90340","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b9b51156cd3db79f8892f30719db8653102a1560e0f2fbe31bca6f9a212bb16e · sha256:05b96fb8839a7e7c… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/sched/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.19"},{"lessThan":"6.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.3","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b9b51156cd3db79f8892f30719db8653102a1560e0f2fbe31bca6f9a212bb16e · sha256:05b96fb8839a7e7c… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/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:b9b51156cd3db79f8892f30719db8653102a1560e0f2fbe31bca6f9a212bb16e · sha256:05b96fb8839a7e7c… · /containers/cna/metrics/0/cvssV3_1

Source references

2 source assertions
{"url":"https://git.kernel.org/stable/c/8d32856fb72ba976d9c87ba405fd17e80419934c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b9b51156cd3db79f8892f30719db8653102a1560e0f2fbe31bca6f9a212bb16e · sha256:05b96fb8839a7e7c… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/de3ab9bd3133899efb92e4cd05ba4203e58fc0a3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b9b51156cd3db79f8892f30719db8653102a1560e0f2fbe31bca6f9a212bb16e · sha256:05b96fb8839a7e7c… · /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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