{"id":"CVE-2026-43109","summary":"x86: shadow stacks: proper error handling for mmap lock","details":"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.","modified":"2026-07-15T01:49:17.028181138Z","published":"2026-05-06T07:40:36.532Z","related":["CGA-grwh-gq6r-8w4c","SUSE-SU-2026:22099-1","SUSE-SU-2026:22108-1","SUSE-SU-2026:22112-1","SUSE-SU-2026:22117-1","SUSE-SU-2026:22127-1","SUSE-SU-2026:22137-1","SUSE-SU-2026:22433-1","SUSE-SU-2026:22458-1","SUSE-SU-2026:2482-1","SUSE-SU-2026:2591-1","SUSE-SU-2026:2800-1","openSUSE-SU-2026:20965-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43109.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1a30468eff661937d978495644d2e5ebfeef5ce6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/262b6d38a81d51b135db81e1f30c13d30e38feee"},{"type":"WEB","url":"https://git.kernel.org/stable/c/52f657e34d7b21b47434d9d8b26fa7f6778b63a0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c79cf42321600e931933e11f94aba8b245d4cd66"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43109.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43109"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7fad2a432cd35bbf104d2d9d426e74902f22aa95"},{"fixed":"c79cf42321600e931933e11f94aba8b245d4cd66"},{"fixed":"1a30468eff661937d978495644d2e5ebfeef5ce6"},{"fixed":"c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4"},{"fixed":"262b6d38a81d51b135db81e1f30c13d30e38feee"},{"fixed":"52f657e34d7b21b47434d9d8b26fa7f6778b63a0"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43109.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.6.0"},{"fixed":"6.6.140"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.88"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.24"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.14"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43109.json"}}],"schema_version":"1.7.5"}