{"id":"CVE-2026-80927","revision":null,"records":[{"revision":"998feebdf30d476a931eccfe4bde4aa8","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80927","aliases":[],"title":"timekeeping: Check the return value of tk_get_aux_ts64 in __do_adjtimex()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntimekeeping: Check the return value of tk_get_aux_ts64 in __do_adjtimex()\n\nIf the auxiliary clock is disabled during tk_get_aux_ts64() but is enabled\nbefore tks->clock_valid is checked, then uninitialized stackdata will be\nused in the calculations and indirectly leaked to userspace.\n\nThe same race window also exists after this change and also for the core\ntimekeeper. But in these cases the only effect would be incorrect\nadjustments and this is userspace's responsibility to avoid this.","state":0,"publishedAt":"2026-09-11T19:42:03.257+00:00","modifiedAt":"2026-10-19T08:45:11.147+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/time/timekeeping.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4eca49d0b621b314ac7c80f363932ec6f6c8abc8\",\n                            \"lessThan\": \"fecf1e37775269ad38c172b468ad4ecc3968aa63\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4eca49d0b621b314ac7c80f363932ec6f6c8abc8\",\n                            \"lessThan\": \"bc59dac50cb45a725f7a50760c7cc72a0964f722\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4eca49d0b621b314ac7c80f363932ec6f6c8abc8\",\n                            \"lessThan\": \"4b61084b11bcecce86d03804ff30f8d7b465593c\",\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/time/timekeeping.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.17\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.17\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/fecf1e37775269ad38c172b468ad4ecc3968aa63","https://git.kernel.org/stable/c/bc59dac50cb45a725f7a50760c7cc72a0964f722","https://git.kernel.org/stable/c/4b61084b11bcecce86d03804ff30f8d7b465593c"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80927","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80927","identifiers":["CVE-2026-80927"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EPSS backfill.","generation":"2026-11-09T05:02:23.3236319+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T05:02:23.3236319+00:00","lastSuccessAt":"2026-11-09T05:02:23.4802497+00:00","error":null,"lastVerifiedAt":"2026-11-09T05:02:23.4802499+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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