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CVE-2026-23127

In the Linux kernel, the following vulnerability has been resolved: perf: Fix refcount warning on event->mmap_count increment When calling refcount_inc(&event->mmap_count) inside perf_mmap_rb(), the following warning is triggered: refcount_t: addition on 0; use-after-free. WARNING: lib/refcount.c:25 PoC: struct perf_event_attr attr = {0}; int fd = syscall(__NR_perf_event_open, &attr, 0, -1, -1, 0); mmap(NULL, 0x3000, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e13217729fe9a5e2578b36f06ef711d1f4fe95bea84f0384ce3222154fe74b21
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":["kernel/events/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.18"},{"lessThan":"6.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.8","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.19","versionType":"original_commit_for_fix"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6cc7f98638e1e838090b593936dc9092ee0478e70e613b88f53a9570ea5ce997 · sha256:74fd14fec5492564… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"Linux","programFiles":["kernel/events/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"23c0e4bd93d0b250775162faf456470485ac9fc7","status":"affected","version":"448f97fba9013ffa13f5dd82febd18836b189499","versionType":"git"},{"lessThan":"d06bf78e55d5159c1b00072e606ab924ffbbad35","status":"affected","version":"448f97fba9013ffa13f5dd82febd18836b189499","versionType":"git"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6cc7f98638e1e838090b593936dc9092ee0478e70e613b88f53a9570ea5ce997 · sha256:74fd14fec5492564… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/events/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.18"},{"lessThan":"6.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.8","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"6.19","versionType":"original_commit_for_fix"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6cc7f98638e1e838090b593936dc9092ee0478e70e613b88f53a9570ea5ce997 · sha256:74fd14fec5492564… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"Linux","programFiles":["kernel/events/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"23c0e4bd93d0b250775162faf456470485ac9fc7","status":"affected","version":"448f97fba9013ffa13f5dd82febd18836b189499","versionType":"git"},{"lessThan":"d06bf78e55d5159c1b00072e606ab924ffbbad35","status":"affected","version":"448f97fba9013ffa13f5dd82febd18836b189499","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6cc7f98638e1e838090b593936dc9092ee0478e70e613b88f53a9570ea5ce997 · sha256:74fd14fec5492564… · /containers/cna/affected/0

Source references

2 source assertions
{"url":"https://git.kernel.org/stable/c/23c0e4bd93d0b250775162faf456470485ac9fc7"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6cc7f98638e1e838090b593936dc9092ee0478e70e613b88f53a9570ea5ce997 · sha256:74fd14fec5492564… · /containers/cna/references/0
{"url":"https://git.kernel.org/stable/c/d06bf78e55d5159c1b00072e606ab924ffbbad35"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6cc7f98638e1e838090b593936dc9092ee0478e70e613b88f53a9570ea5ce997 · sha256:74fd14fec5492564… · /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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