{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89753", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.763Z", "datePublished": "2026-09-11T19:46:56.806Z", "dateUpdated": "2026-09-11T19:46:56.806Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:46:56.806Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/vmscan: report RCU-tasks quiescent states in shrink_lruvec()\n\nI am seeing some rcu_tasks stalls in the Meta fleet during reclaim.\n\n INFO: rcu_tasks detected stalls on tasks:\n\t0000000088620d09: .. nvcsw: 6735/6735 holdout: 1 idle_cpu: -1/8\n\ttask:GlobalCPUThread state:R running task pid:2552016 tgid:2524552\n Call Trace:\n shrink_lruvec\n mem_cgroup_iter\n shrink_node\n do_try_to_free_pages\n try_to_free_pages\n __alloc_frozen_pages_noprof\n alloc_pages_noprof\n pte_alloc_one\n __pte_alloc\n handle_mm_fault\n\nNothing promises direct reclaim returns in bounded time, and the scan loop\nin shrink_lruvec() only calls cond_resched(), which is a no-op on\nPREEMPTION kernels. Involuntary preemption is not a Tasks-RCU quiescent\nstate, so the reclaiming task never reports one and becomes a holdout.\n\nUpgrade it to cond_resched_tasks_rcu_qs(), which reports a quiescent state\neven when cond_resched() does nothing.\n\nPS: This has been discussed in [1]"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/vmscan.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "b5391676c61d94ffe3272dcf6723738b802f79e8", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "3fd50239986302cb050d3649351bcec00fa9d5ab", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "cf3ba0911a1cf8680371ff113b90088edd01d2bb", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "25f52e81216884a7444bf07a606691feb09a94e3", "status": "affected", "versionType": "git"}, {"version": "0", "lessThan": "6.12.109", "status": "affected", "versionType": "semver"}, {"version": "0", "lessThan": "6.18.50", "status": "affected", "versionType": "semver"}, {"version": "0", "lessThan": "7.2.4", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/vmscan.c"], "versions": [{"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc1", "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:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b5391676c61d94ffe3272dcf6723738b802f79e8"}, {"url": "https://git.kernel.org/stable/c/3fd50239986302cb050d3649351bcec00fa9d5ab"}, {"url": "https://git.kernel.org/stable/c/cf3ba0911a1cf8680371ff113b90088edd01d2bb"}, {"url": "https://git.kernel.org/stable/c/25f52e81216884a7444bf07a606691feb09a94e3"}], "title": "mm/vmscan: report RCU-tasks quiescent states in shrink_lruvec()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["mm/vmscan.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b5391676c61d94ffe3272dcf6723738b802f79e8", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "3fd50239986302cb050d3649351bcec00fa9d5ab", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "cf3ba0911a1cf8680371ff113b90088edd01d2bb", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "25f52e81216884a7444bf07a606691feb09a94e3", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "6.12.109", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThan": "6.18.50", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThan": "7.2.4", "status": "affected", "version": "0", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["mm/vmscan.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/vmscan: report RCU-tasks quiescent states in shrink_lruvec()\n\nI am seeing some rcu_tasks stalls in the Meta fleet during reclaim.\n\n INFO: rcu_tasks detected stalls on tasks:\n\t0000000088620d09: .. nvcsw: 6735/6735 holdout: 1 idle_cpu: -1/8\n\ttask:GlobalCPUThread state:R running task pid:2552016 tgid:2524552\n Call Trace:\n shrink_lruvec\n mem_cgroup_iter\n shrink_node\n do_try_to_free_pages\n try_to_free_pages\n __alloc_frozen_pages_noprof\n alloc_pages_noprof\n pte_alloc_one\n __pte_alloc\n handle_mm_fault\n\nNothing promises direct reclaim returns in bounded time, and the scan loop\nin shrink_lruvec() only calls cond_resched(), which is a no-op on\nPREEMPTION kernels. Involuntary preemption is not a Tasks-RCU quiescent\nstate, so the reclaiming task never reports one and becomes a holdout.\n\nUpgrade it to cond_resched_tasks_rcu_qs(), which reports a quiescent state\neven when cond_resched() does nothing.\n\nPS: This has been discussed in [1]"}], "id": "CVE-2026-89753", "lastModified": "2026-09-11T20:20:06.270", "metrics": {}, "published": "2026-09-11T20:20:06.270", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/25f52e81216884a7444bf07a606691feb09a94e3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3fd50239986302cb050d3649351bcec00fa9d5ab"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b5391676c61d94ffe3272dcf6723738b802f79e8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cf3ba0911a1cf8680371ff113b90088edd01d2bb"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: Denial of Service due to RCU task stalls in memory reclaim", "id": "2532148", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532148"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-821", "details": ["A flaw was found in the Linux kernel's memory management subsystem. The `shrink_lruvec()` function, responsible for memory reclaim, fails to properly report Read-Copy-Update (RCU) task quiescent states on systems with preemption enabled. This can lead to RCU task stalls, causing system unresponsiveness or a denial of service."], "name": "CVE-2026-89753", "public_date": "2026-09-11T19:46:56Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89753\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89753\nhttps://git.kernel.org/stable/c/25f52e81216884a7444bf07a606691feb09a94e3\nhttps://git.kernel.org/stable/c/3fd50239986302cb050d3649351bcec00fa9d5ab\nhttps://git.kernel.org/stable/c/b5391676c61d94ffe3272dcf6723738b802f79e8\nhttps://git.kernel.org/stable/c/cf3ba0911a1cf8680371ff113b90088edd01d2bb"], "threat_severity": "Moderate"}

{}