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CVE-2026-43009

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix incorrect pruning due to atomic fetch precision tracking When backtrack_insn encounters a BPF_STX instruction with BPF_ATOMIC and BPF_FETCH, the src register (or r0 for BPF_CMPXCHG) also acts as a destination, thus receiving the old value from the memory location. The current backtracking logic does not account for this. It treats atomic fetch operations the same as regular stores where the src register is only an in
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:6fbe8b5c3ff4098fdd7d5ded98bc6c7c71521dfafadc78f0a55e2ed45d7ea247
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/bpf/verifier.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"7ffbe45b1d227e24659998a91cfd4c27af457e71","status":"affected","version":"5ca419f2864a2c60940dcf4bbaeb69546200e36f","versionType":"git"},{"lessThan":"179ee84a89114b854ac2dd1d293633a7f6c8dac1","status":"affected","version":"5ca419f2864a2c60940dcf4bbaeb69546200e36f","versionType":"git"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4440d803ad6ed41b21d6933e76ea1e5a8ec256a207655338584c89c03d8290d4 · sha256:efc51df49dd35030… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/bpf/verifier.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.12"},{"lessThan":"5.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4440d803ad6ed41b21d6933e76ea1e5a8ec256a207655338584c89c03d8290d4 · sha256:efc51df49dd35030… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["kernel/bpf/verifier.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"7ffbe45b1d227e24659998a91cfd4c27af457e71","status":"affected","version":"5ca419f2864a2c60940dcf4bbaeb69546200e36f","versionType":"git"},{"lessThan":"179ee84a89114b854ac2dd1d293633a7f6c8dac1","status":"affected","version":"5ca419f2864a2c60940dcf4bbaeb69546200e36f","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4440d803ad6ed41b21d6933e76ea1e5a8ec256a207655338584c89c03d8290d4 · sha256:efc51df49dd35030… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/bpf/verifier.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.12"},{"lessThan":"5.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4440d803ad6ed41b21d6933e76ea1e5a8ec256a207655338584c89c03d8290d4 · sha256:efc51df49dd35030… · /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:v2:4440d803ad6ed41b21d6933e76ea1e5a8ec256a207655338584c89c03d8290d4 · sha256:efc51df49dd35030… · /containers/cna/metrics/0/cvssV3_1

Source references

2 source assertions
{"url":"https://git.kernel.org/stable/c/179ee84a89114b854ac2dd1d293633a7f6c8dac1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4440d803ad6ed41b21d6933e76ea1e5a8ec256a207655338584c89c03d8290d4 · sha256:efc51df49dd35030… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/7ffbe45b1d227e24659998a91cfd4c27af457e71"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4440d803ad6ed41b21d6933e76ea1e5a8ec256a207655338584c89c03d8290d4 · sha256:efc51df49dd35030… · /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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