{"id":"CVE-2026-31554","revision":"5320f173342b4ceeae19fea2e105fa6d","records":[{"revision":"5320f173342b4ceeae19fea2e105fa6d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-31554","aliases":[],"title":"futex: Require sys_futex_requeue() to have identical flags","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfutex: Require sys_futex_requeue() to have identical flags\n\nNicholas reported that his LLM found it was possible to create a UaF\nwhen sys_futex_requeue() is used with different flags. The initial\nmotivation for allowing different flags was the variable sized futex,\nbut since that hasn't been merged (yet), simply mandate the flags are\nidentical, as is the case for the old style sys_futex() requeue\noperations.","state":0,"publishedAt":"2026-04-24T14:35:38.527+00:00","modifiedAt":"2026-10-19T18:55:58.799+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"kernel/futex/syscalls.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"0f4b5f972216782a4acb1ae00dcb55173847c2ff\",\n                            \"lessThan\": \"027145ace09fad4c7cbcd6c61fe9b429c63eb0e5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0f4b5f972216782a4acb1ae00dcb55173847c2ff\",\n                            \"lessThan\": \"18b7d09c2b794c71d4252f3ea2cf84ad12b73d6a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0f4b5f972216782a4acb1ae00dcb55173847c2ff\",\n                            \"lessThan\": \"e2f78c7ec1655fedd945366151ba54fcb9580508\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0f4b5f972216782a4acb1ae00dcb55173847c2ff\",\n                            \"lessThan\": \"19f94b39058681dec64a10ebeb6f23fe7fc3f77a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"kernel/futex/syscalls.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.7\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.7\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.80\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.21\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.11\",\n                            \"lessThanOrEqual\": \"6.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/027145ace09fad4c7cbcd6c61fe9b429c63eb0e5","https://git.kernel.org/stable/c/18b7d09c2b794c71d4252f3ea2cf84ad12b73d6a","https://git.kernel.org/stable/c/e2f78c7ec1655fedd945366151ba54fcb9580508","https://git.kernel.org/stable/c/19f94b39058681dec64a10ebeb6f23fe7fc3f77a"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31554","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-31554","identifiers":["CVE-2026-31554"]},"retained":false,"historicalAffected":[]}],"coverage":[]}