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CVE-2026-43418

In the Linux kernel, the following vulnerability has been resolved: sched/mmcid: Prevent CID stalls due to concurrent forks A newly forked task is accounted as MMCID user before the task is visible in the process' thread list and the global task list. This creates the following problem: CPU1 CPU2 fork() sched_mm_cid_fork(tnew1) tnew1->mm.mm_cid_users++; tnew1->mm_cid.cid = getcid() -> preemption fork() sched_mm_cid_fork(tnew2) tnew2->mm.mm_cid_users++;
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:9f30878d76b0d169c87a27928e2c190e2973f24a51c19a4e027ffd40f2644472
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":["include/linux/sched.h","kernel/fork.c","kernel/sched/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"f0189d49282e0458f3a737bd486c1ec048148f66","status":"affected","version":"fbd0e71dc370af73f6b316e4de9eed273dd90340","versionType":"git"},{"lessThan":"b2e48c429ec54715d16fefa719dd2fbded2e65be","status":"affected","version":"fbd0e71dc370af73f6b316e4de9eed273dd90340","versionType":"git"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:86f42a657e38a99225820be66356e81b2d541c30e900ddb48381c87bd484e502 · sha256:d590850ccf6155f1… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["include/linux/sched.h","kernel/fork.c","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":"6.19.*","status":"unaffected","version":"6.19.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:86f42a657e38a99225820be66356e81b2d541c30e900ddb48381c87bd484e502 · sha256:d590850ccf6155f1… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/linux/sched.h","kernel/fork.c","kernel/sched/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"f0189d49282e0458f3a737bd486c1ec048148f66","status":"affected","version":"fbd0e71dc370af73f6b316e4de9eed273dd90340","versionType":"git"},{"lessThan":"b2e48c429ec54715d16fefa719dd2fbded2e65be","status":"affected","version":"fbd0e71dc370af73f6b316e4de9eed273dd90340","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:86f42a657e38a99225820be66356e81b2d541c30e900ddb48381c87bd484e502 · sha256:d590850ccf6155f1… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["include/linux/sched.h","kernel/fork.c","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":"6.19.*","status":"unaffected","version":"6.19.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:86f42a657e38a99225820be66356e81b2d541c30e900ddb48381c87bd484e502 · sha256:d590850ccf6155f1… · /containers/cna/affected/1

Source references

2 source assertions
{"url":"https://git.kernel.org/stable/c/b2e48c429ec54715d16fefa719dd2fbded2e65be"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:86f42a657e38a99225820be66356e81b2d541c30e900ddb48381c87bd484e502 · sha256:d590850ccf6155f1… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/f0189d49282e0458f3a737bd486c1ec048148f66"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:86f42a657e38a99225820be66356e81b2d541c30e900ddb48381c87bd484e502 · sha256:d590850ccf6155f1… · /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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