{"id":"CVE-2026-43109","title":"x86: shadow stacks: proper error handling for mmap lock","summary":"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…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 7fad2a432cd35bbf104d2d9d426e74902f22aa95 < c79cf42321600e931933e11f94aba8b245d4cd66","Linux >= 7fad2a432cd35bbf104d2d9d426e74902f22aa95 < 1a30468eff661937d978495644d2e5ebfeef5ce6","Linux >= 7fad2a432cd35bbf104d2d9d426e74902f22aa95 < c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4","Linux >= 7fad2a432cd35bbf104d2d9d426e74902f22aa95 < 262b6d38a81d51b135db81e1f30c13d30e38feee","Linux >= 7fad2a432cd35bbf104d2d9d426e74902f22aa95 < 52f657e34d7b21b47434d9d8b26fa7f6778b63a0","Linux 6.6"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T15:28:39.316247Z"},"published":"2026-05-06","updated":"2026-11-06","sourceUpdated":"2026-11-06T15:32:31.640Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43109","references":[{"url":"https://git.kernel.org/stable/c/c79cf42321600e931933e11f94aba8b245d4cd66"},{"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"}],"tags":["cve.org"],"epss":0.00114,"epssPercentile":0.01464,"ingestedAt":"2026-11-06T15:54:04.022Z","slug":"CVE-2026-43109","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 7fad2a432cd35bbf104d2d9d426e74902f22aa95 < c79cf42321600e931933e11f94aba8b245d4cd66`\n- `Linux >= 7fad2a432cd35bbf104d2d9d426e74902f22aa95 < 1a30468eff661937d978495644d2e5ebfeef5ce6`\n- `Linux >= 7fad2a432cd35bbf104d2d9d426e74902f22aa95 < c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4`\n- `Linux >= 7fad2a432cd35bbf104d2d9d426e74902f22aa95 < 262b6d38a81d51b135db81e1f30c13d30e38feee`\n- `Linux >= 7fad2a432cd35bbf104d2d9d426e74902f22aa95 < 52f657e34d7b21b47434d9d8b26fa7f6778b63a0`\n- `Linux 6.6`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}