{"id":"CVE-2026-98463","revision":null,"records":[{"revision":"3434275047e34287a591cb9e2ec43e12","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98463","aliases":[],"title":"sched_ext: Derive SCX_RQ_IN_WAKEUP from the core enqueue flags","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Derive SCX_RQ_IN_WAKEUP from the core enqueue flags\n\nschedule_deferred_locked() skips scheduling a deferred action while\nSCX_RQ_IN_WAKEUP is set and relies on the task_woken_scx() call that follows\na wakeup enqueue to run it. enqueue_task_scx() sets the flag from the merged\nenqueue flags, which include the flags stashed for a remote activation.\nmove_remote_task_to_local_dsq() thus sets SCX_RQ_IN_WAKEUP on the\ndestination rq when the moved task was woken up, although no\ntask_woken_scx() follows that activation.\n\nAn IMMED insert into a busy destination requests a local reenqueue during\nthat enqueue. The request gets linked but not scheduled and stays pending\nuntil an unrelated wakeup or preemption on that CPU runs the deferred\nactions. The IMMED task sits behind the running task in the meantime. If\nnothing runs them before the scheduler is disabled, the request outlives the\nscheduler and points into its freed per-cpu area, which the next scheduler\ndereferences from run_deferred().\n\nTest the core enqueue flags for the wakeup bit. Only the core's wakeup path\nis followed by task_woken_scx().","state":0,"publishedAt":"2026-10-18T15:15:15.775+00:00","modifiedAt":"2026-10-19T09:20:01.13+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/sched/ext/ext.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"997967adf10ce26c3e7bd89598b3ded62b943052\",\n                            \"lessThan\": \"6c401ae426e20e53a3398a8e79afd0964c0f5110\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"57ccf5ccdc56954f2a91a7f66684fd31c566bde5\",\n                            \"lessThan\": \"3fdf2ceb31e8aff77451e468bc8409e10587916a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"57ccf5ccdc56954f2a91a7f66684fd31c566bde5\",\n                            \"lessThan\": \"df5cdc2c832ca4e8a6d774596b9005558761a403\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ee502c056c4c9cce4c132ccb588e06ffe5b831c1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.18.19\",\n                            \"lessThan\": \"6.18.55\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.9\",\n                            \"lessThan\": \"6.20\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\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/sched/ext/ext.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"7.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.55\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.9\",\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/6c401ae426e20e53a3398a8e79afd0964c0f5110","https://git.kernel.org/stable/c/3fdf2ceb31e8aff77451e468bc8409e10587916a","https://git.kernel.org/stable/c/df5cdc2c832ca4e8a6d774596b9005558761a403"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98463","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98463","identifiers":["CVE-2026-98463"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-09T00:02:23.6066046+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-09T00:02:23.6066046+00:00","lastSuccessAt":"2026-11-09T00:02:23.7657636+00:00","error":null,"lastVerifiedAt":"2026-11-09T00:02:23.7657682+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-eaa64dac63caa79c8d4905619258c41c51b39e461b996124e1a21b5e85e7e738-06f887e3cff12cdbfc1e6b879a816e143efd9863ce6bea9ec9f7392bb9208c22","complete":true,"records":421267,"lastAttemptAt":"2026-11-09T00:02:15.6996628+00:00","lastSuccessAt":"2026-11-09T00:02:15.5944139+00:00","error":null,"lastVerifiedAt":"2026-11-09T00:02:15.6996628+00:00","snapshotPublishedAt":"2026-11-08T23:22:42+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-f237dc1707364963bb107ea6f7331307","complete":false,"records":13654,"lastAttemptAt":"2026-11-09T00:14:09.8878175+00:00","lastSuccessAt":"2026-11-09T00:14:09.883+00:00","error":null,"lastVerifiedAt":"2026-11-09T00:14:09.883+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13624,"expectedIdentifiers":13706,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-09T00:02:23.6066046+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T00:02:23.6066046+00:00","lastSuccessAt":"2026-11-09T00:02:23.7665616+00:00","error":null,"lastVerifiedAt":"2026-11-09T00:02:23.7665617+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. No reader inventory is sent.","generation":"enrichment-47b506589c26469684507bfb31b90a8d","complete":true,"records":13666,"lastAttemptAt":"2026-11-09T00:02:25.3547919+00:00","lastSuccessAt":"2026-11-09T00:02:25.351+00:00","error":null,"lastVerifiedAt":"2026-11-09T00:02:25.351+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13706,"expectedIdentifiers":13706,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-980593e6977a6d1b4fb1eed5a1ffe88a468736f89f0a06f710924ad59132c023","complete":true,"records":9914,"lastAttemptAt":"2026-11-09T00:02:16.0496746+00:00","lastSuccessAt":"2026-11-08T11:07:07.068788+00:00","error":null,"lastVerifiedAt":"2026-11-09T00:02:16.0496746+00:00","snapshotPublishedAt":"2026-11-08T11:02:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-fde804134ecdda0ddd5ff5c26ee1fff5a6fa659311f7ef2e51c6ad54964db0e2","complete":true,"records":1971,"lastAttemptAt":"2026-11-09T00:02:15.8362171+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-09T00:02:15.8362171+00:00","snapshotPublishedAt":"2026-11-06T18:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-3b1150af6d7ada2c07356cbab4ead5224c1485027890f71c71d0742cddf0b9e8","complete":true,"records":3055,"lastAttemptAt":"2026-11-09T00:02:23.5770506+00:00","lastSuccessAt":"2026-11-09T00:02:23.4330288+00:00","error":null,"lastVerifiedAt":"2026-11-09T00:02:23.5770506+00:00","snapshotPublishedAt":"2026-11-08T23:17:54+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-f8647d7ba64b1ba0dfdc7130944766d5b36d5b77d18fff0c79e651a4cff3c2b9","complete":true,"records":231293,"lastAttemptAt":"2026-11-09T00:02:15.9369765+00:00","lastSuccessAt":"2026-11-08T11:06:56.2918717+00:00","error":null,"lastVerifiedAt":"2026-11-09T00:02:15.9369765+00:00","snapshotPublishedAt":"2026-11-08T11:02:50+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}