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CVE-2026-43109

In the Linux kernel, the following vulnerability has been resolved: x86: shadow stacks: proper error handling for mmap lock 김영민 reports that shstk_pop_sigframe() doesn't check for errors from mmap_read_lock_killable(), which is a silly oversight, and also shows that we haven't marked those functions with "__must_check", which would have immediately caught it. So let's fix both issues.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:97282539d828509bc8943469e0d14283f6bd7c4e9206ad5009a1e7901b32f4f7
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":["arch/x86/kernel/shstk.c","include/linux/mmap_lock.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c79cf42321600e931933e11f94aba8b245d4cd66","status":"affected","version":"7fad2a432cd35bbf104d2d9d426e74902f22aa95","versionType":"git"},{"lessThan":"1a30468eff661937d978495644d2e5ebfeef5ce6","status":"affected","version":"7fad2a432cd35bbf104d2d9d426e74902f22aa95","versionType":"git"},{"lessThan":"c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4","status":"affected","vers…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:97fabc1dcb469e13b4f23a3a06605e94dd65b9d3f180909d8d66cc429a67c16b · sha256:1257fa5ee6139438… · /containers/cna/affected/0

{"defaultStatus":"affected","product":"Linux","programFiles":["arch/x86/kernel/shstk.c","include/linux/mmap_lock.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.6"},{"lessThan":"6.6","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.140","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.88","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.24","versio…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:97fabc1dcb469e13b4f23a3a06605e94dd65b9d3f180909d8d66cc429a67c16b · sha256:1257fa5ee6139438… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/x86/kernel/shstk.c","include/linux/mmap_lock.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c79cf42321600e931933e11f94aba8b245d4cd66","status":"affected","version":"7fad2a432cd35bbf104d2d9d426e74902f22aa95","versionType":"git"},{"lessThan":"1a30468eff661937d978495644d2e5ebfeef5ce6","status":"affected","version":"7fad2a432cd35bbf104d2d9d426e74902f22aa95","versionType":"git"},{"lessThan":"c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4","status":"affected","vers…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:97fabc1dcb469e13b4f23a3a06605e94dd65b9d3f180909d8d66cc429a67c16b · sha256:1257fa5ee6139438… · /containers/cna/affected/0
{"defaultStatus":"affected","product":"Linux","programFiles":["arch/x86/kernel/shstk.c","include/linux/mmap_lock.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.6"},{"lessThan":"6.6","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.140","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.88","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.24","versio…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:97fabc1dcb469e13b4f23a3a06605e94dd65b9d3f180909d8d66cc429a67c16b · sha256:1257fa5ee6139438… · /containers/cna/affected/1

Source references

5 source assertions
{"url":"https://git.kernel.org/stable/c/1a30468eff661937d978495644d2e5ebfeef5ce6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:97fabc1dcb469e13b4f23a3a06605e94dd65b9d3f180909d8d66cc429a67c16b · sha256:1257fa5ee6139438… · /containers/cna/references/1
{"url":"https://git.kernel.org/stable/c/262b6d38a81d51b135db81e1f30c13d30e38feee"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:97fabc1dcb469e13b4f23a3a06605e94dd65b9d3f180909d8d66cc429a67c16b · sha256:1257fa5ee6139438… · /containers/cna/references/3
{"url":"https://git.kernel.org/stable/c/52f657e34d7b21b47434d9d8b26fa7f6778b63a0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:97fabc1dcb469e13b4f23a3a06605e94dd65b9d3f180909d8d66cc429a67c16b · sha256:1257fa5ee6139438… · /containers/cna/references/4
{"url":"https://git.kernel.org/stable/c/c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:97fabc1dcb469e13b4f23a3a06605e94dd65b9d3f180909d8d66cc429a67c16b · sha256:1257fa5ee6139438… · /containers/cna/references/2
{"url":"https://git.kernel.org/stable/c/c79cf42321600e931933e11f94aba8b245d4cd66"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:97fabc1dcb469e13b4f23a3a06605e94dd65b9d3f180909d8d66cc429a67c16b · sha256:1257fa5ee6139438… · /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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