{"api_version":"1","generated_at":"2026-09-12T10:56:38+00:00","cve":"CVE-2026-89519","urls":{"html":"https://cve.report/CVE-2026-89519","api":"https://cve.report/api/cve/CVE-2026-89519.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-89519","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-89519"},"summary":{"title":"sched_ext: Replace SCX_RQ_BAL_KEEP with a dispatch verdict return","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Replace SCX_RQ_BAL_KEEP with a dispatch verdict return\n\nSCX_RQ_BAL_KEEP tells the pick to keep running the previous task, a leftover\nfrom when balancing and picking were separate operations. An rq-level flag\nonly works while dispatches and picks pair up one to one, which core\nscheduling breaks: selections interleave through dispatch's lock drops and a\npick can consume a stale flag, keeping a task that has since been dequeued.\nFixing core scheduling support requires the decision to travel with the\ndispatch that made it. Make scx_dispatch_sched() and balance_one() return an\nexplicit verdict instead and drop the flag's plumbing from the tools autogen\nenum headers.\n\nAlso factor the pick-side invocation, its follow-up queueing and the\npost-dispatch checks out of do_pick_task_scx() into dispatch_pick(). No\nfunctional changes intended.\n\nv2: Drop the SCX_RQ_BAL_KEEP plumbing from the tools autogen enum headers\n    as well (Andrea).","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-11 20:19:34","updated_at":"2026-09-11 20:19:34"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/6f1d3bfe54430f8d54e0530a27f2ecbf8466576e","name":"https://git.kernel.org/stable/c/6f1d3bfe54430f8d54e0530a27f2ecbf8466576e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ffaab58d217581cb75353168f8812a16e10463fc","name":"https://git.kernel.org/stable/c/ffaab58d217581cb75353168f8812a16e10463fc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89519","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89519","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4c95380701f58b8112f0b891de8d160e4199e19d 6f1d3bfe54430f8d54e0530a27f2ecbf8466576e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4c95380701f58b8112f0b891de8d160e4199e19d ffaab58d217581cb75353168f8812a16e10463fc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.19","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.4 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["kernel/sched/ext/ext.c","kernel/sched/sched.h","tools/sched_ext/include/scx/enum_defs.autogen.h","tools/sched_ext/include/scx/enums.autogen.bpf.h","tools/sched_ext/include/scx/enums.autogen.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"6f1d3bfe54430f8d54e0530a27f2ecbf8466576e","status":"affected","version":"4c95380701f58b8112f0b891de8d160e4199e19d","versionType":"git"},{"lessThan":"ffaab58d217581cb75353168f8812a16e10463fc","status":"affected","version":"4c95380701f58b8112f0b891de8d160e4199e19d","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/sched/ext/ext.c","kernel/sched/sched.h","tools/sched_ext/include/scx/enum_defs.autogen.h","tools/sched_ext/include/scx/enums.autogen.bpf.h","tools/sched_ext/include/scx/enums.autogen.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.19"},{"lessThan":"6.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.4","versionStartIncluding":"6.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"6.19","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Replace SCX_RQ_BAL_KEEP with a dispatch verdict return\n\nSCX_RQ_BAL_KEEP tells the pick to keep running the previous task, a leftover\nfrom when balancing and picking were separate operations. An rq-level flag\nonly works while dispatches and picks pair up one to one, which core\nscheduling breaks: selections interleave through dispatch's lock drops and a\npick can consume a stale flag, keeping a task that has since been dequeued.\nFixing core scheduling support requires the decision to travel with the\ndispatch that made it. Make scx_dispatch_sched() and balance_one() return an\nexplicit verdict instead and drop the flag's plumbing from the tools autogen\nenum headers.\n\nAlso factor the pick-side invocation, its follow-up queueing and the\npost-dispatch checks out of do_pick_task_scx() into dispatch_pick(). No\nfunctional changes intended.\n\nv2: Drop the SCX_RQ_BAL_KEEP plumbing from the tools autogen enum headers\n    as well (Andrea)."}],"providerMetadata":{"dateUpdated":"2026-09-11T19:44:01.858Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/6f1d3bfe54430f8d54e0530a27f2ecbf8466576e"},{"url":"https://git.kernel.org/stable/c/ffaab58d217581cb75353168f8812a16e10463fc"}],"title":"sched_ext: Replace SCX_RQ_BAL_KEEP with a dispatch verdict return","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-89519","datePublished":"2026-09-11T19:44:01.858Z","dateReserved":"2026-09-11T19:38:34.718Z","dateUpdated":"2026-09-11T19:44:01.858Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-11 20:19:34","lastModifiedDate":"2026-09-11 20:19:34","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"89519","Ordinal":"1","Title":"sched_ext: Replace SCX_RQ_BAL_KEEP with a dispatch verdict retur","CVE":"CVE-2026-89519","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"89519","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Replace SCX_RQ_BAL_KEEP with a dispatch verdict return\n\nSCX_RQ_BAL_KEEP tells the pick to keep running the previous task, a leftover\nfrom when balancing and picking were separate operations. An rq-level flag\nonly works while dispatches and picks pair up one to one, which core\nscheduling breaks: selections interleave through dispatch's lock drops and a\npick can consume a stale flag, keeping a task that has since been dequeued.\nFixing core scheduling support requires the decision to travel with the\ndispatch that made it. Make scx_dispatch_sched() and balance_one() return an\nexplicit verdict instead and drop the flag's plumbing from the tools autogen\nenum headers.\n\nAlso factor the pick-side invocation, its follow-up queueing and the\npost-dispatch checks out of do_pick_task_scx() into dispatch_pick(). No\nfunctional changes intended.\n\nv2: Drop the SCX_RQ_BAL_KEEP plumbing from the tools autogen enum headers\n    as well (Andrea).","Type":"Description","Title":"sched_ext: Replace SCX_RQ_BAL_KEEP with a dispatch verdict retur"}]}}}