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CVE-2026-63825

In the Linux kernel, the following vulnerability has been resolved: gcov: use atomic counter updates to fix concurrent access crashes GCC's GCOV instrumentation can merge global branch counters with loop induction variables as an optimization. In inflate_fast(), the inner copy loops get transformed so that the GCOV counter value is loaded multiple times to compute the loop base address, start index, and end bound. Since GCOV counters are global (not per-CPU), concurrent execution on differen
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:68bd84f650787bda7cbf801c99ff3a6af71c56c5ec25186e59e638c095ae4798
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":["Makefile"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"49d893b9cbcfc5802a32e53a64c6c6956670d65b","status":"affected","version":"2521f2c228ad750701ba4702484e31d876dbc386","versionType":"git"},{"lessThan":"5b959c1dbb4522b9e3ac4e26ad638b8784869841","status":"affected","version":"2521f2c228ad750701ba4702484e31d876dbc386","versionType":"git"},{"lessThan":"56cb9b7d96b28a1173a510ab25354b6599ad3a33","status":"affected","version":"2521f2c228ad750701ba4702484e31d876dbc…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:547e2c5caffe53cf0a30206e9970283e444e3382600ca9e1aba04cf35edf502a · sha256:151b9f5c539a82c7… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["Makefile"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.31"},{"lessThan":"2.6.31","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.38","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:v2:547e2c5caffe53cf0a30206e9970283e444e3382600ca9e1aba04cf35edf502a · sha256:151b9f5c539a82c7… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["Makefile"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"49d893b9cbcfc5802a32e53a64c6c6956670d65b","status":"affected","version":"2521f2c228ad750701ba4702484e31d876dbc386","versionType":"git"},{"lessThan":"5b959c1dbb4522b9e3ac4e26ad638b8784869841","status":"affected","version":"2521f2c228ad750701ba4702484e31d876dbc386","versionType":"git"},{"lessThan":"56cb9b7d96b28a1173a510ab25354b6599ad3a33","status":"affected","version":"2521f2c228ad750701ba4702484e31d876dbc…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:547e2c5caffe53cf0a30206e9970283e444e3382600ca9e1aba04cf35edf502a · sha256:151b9f5c539a82c7… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["Makefile"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.31"},{"lessThan":"2.6.31","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.38","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:v2:547e2c5caffe53cf0a30206e9970283e444e3382600ca9e1aba04cf35edf502a · sha256:151b9f5c539a82c7… · /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:v2:547e2c5caffe53cf0a30206e9970283e444e3382600ca9e1aba04cf35edf502a · sha256:151b9f5c539a82c7… · /containers/cna/metrics/0/cvssV3_1

Source references

3 source assertions
{"url":"https://git.kernel.org/stable/c/49d893b9cbcfc5802a32e53a64c6c6956670d65b"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:547e2c5caffe53cf0a30206e9970283e444e3382600ca9e1aba04cf35edf502a · sha256:151b9f5c539a82c7… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/56cb9b7d96b28a1173a510ab25354b6599ad3a33"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:547e2c5caffe53cf0a30206e9970283e444e3382600ca9e1aba04cf35edf502a · sha256:151b9f5c539a82c7… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/5b959c1dbb4522b9e3ac4e26ad638b8784869841"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:547e2c5caffe53cf0a30206e9970283e444e3382600ca9e1aba04cf35edf502a · sha256:151b9f5c539a82c7… · /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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