{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43109","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-01T14:12:55.986Z","datePublished":"2026-05-06T07:40:36.532Z","dateUpdated":"2026-05-14T14:30:13.597Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-14T14:30:13.597Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86: shadow stacks: proper error handling for mmap lock\n\n김영민 reports that shstk_pop_sigframe() doesn't check for errors from\nmmap_read_lock_killable(), which is a silly oversight, and also shows\nthat we haven't marked those functions with \"__must_check\", which would\nhave immediately caught it.\n\nSo let's fix both issues."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kernel/shstk.c","include/linux/mmap_lock.h"],"versions":[{"version":"7fad2a432cd35bbf104d2d9d426e74902f22aa95","lessThan":"1a30468eff661937d978495644d2e5ebfeef5ce6","status":"affected","versionType":"git"},{"version":"7fad2a432cd35bbf104d2d9d426e74902f22aa95","lessThan":"c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4","status":"affected","versionType":"git"},{"version":"7fad2a432cd35bbf104d2d9d426e74902f22aa95","lessThan":"262b6d38a81d51b135db81e1f30c13d30e38feee","status":"affected","versionType":"git"},{"version":"7fad2a432cd35bbf104d2d9d426e74902f22aa95","lessThan":"52f657e34d7b21b47434d9d8b26fa7f6778b63a0","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kernel/shstk.c","include/linux/mmap_lock.h"],"versions":[{"version":"6.6","status":"affected"},{"version":"0","lessThan":"6.6","status":"unaffected","versionType":"semver"},{"version":"6.12.88","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.24","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.14","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.12.88"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.18.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.19.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/1a30468eff661937d978495644d2e5ebfeef5ce6"},{"url":"https://git.kernel.org/stable/c/c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4"},{"url":"https://git.kernel.org/stable/c/262b6d38a81d51b135db81e1f30c13d30e38feee"},{"url":"https://git.kernel.org/stable/c/52f657e34d7b21b47434d9d8b26fa7f6778b63a0"}],"title":"x86: shadow stacks: proper error handling for mmap lock","x_generator":{"engine":"bippy-1.2.0"}}}}