CVE-2026-89519

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89519", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.718Z", "datePublished": "2026-09-11T19:44:01.858Z", "dateUpdated": "2026-10-19T08:48:10.533Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:48:10.533Z"}, "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)."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "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"], "versions": [{"version": "4c95380701f58b8112f0b891de8d160e4199e19d", "lessThan": "6f1d3bfe54430f8d54e0530a27f2ecbf8466576e", "status": "affected", "versionType": "git"}, {"version": "4c95380701f58b8112f0b891de8d160e4199e19d", "lessThan": "ffaab58d217581cb75353168f8812a16e10463fc", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "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"], "versions": [{"version": "6.19", "status": "affected"}, {"version": "0", "lessThan": "6.19", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "7.3"}]}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"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", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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)."}], "id": "CVE-2026-89519", "lastModified": "2026-10-19T09:17:46.333", "metrics": {}, "published": "2026-09-11T20:19:34.533", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6f1d3bfe54430f8d54e0530a27f2ecbf8466576e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ffaab58d217581cb75353168f8812a16e10463fc"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel `sched_ext`: Incorrect task scheduling due to stale flag", "id": "2532339", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532339"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-367", "details": ["A flaw was found in the Linux kernel's `sched_ext` component. Due to a logical error where a stale flag (`SCX_RQ_BAL_KEEP`) could be consumed, the scheduler might incorrectly keep a task running even after it has been dequeued. This could lead to unexpected task management behavior within the kernel."], "name": "CVE-2026-89519", "public_date": "2026-09-11T19:44:01Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89519\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89519\nhttps://git.kernel.org/stable/c/6f1d3bfe54430f8d54e0530a27f2ecbf8466576e\nhttps://git.kernel.org/stable/c/ffaab58d217581cb75353168f8812a16e10463fc"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4c95380701f58b8112f0b891de8d160e4199e19d,6f1d3bfe54430f8d54e0530a27f2ecbf8466576e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4c95380701f58b8112f0b891de8d160e4199e19d,ffaab58d217581cb75353168f8812a16e10463fc)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T03:45:07.948903+00:00", "updated": "2026-09-21T01:30:08.749902+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}