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CVE-2026-89753 (GCVE-0-2026-89753)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:46 – Updated: 2026-09-14 12:02
VLAI
Title
mm/vmscan: report RCU-tasks quiescent states in shrink_lruvec()
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/vmscan: report RCU-tasks quiescent states in shrink_lruvec() I am seeing some rcu_tasks stalls in the Meta fleet during reclaim. INFO: rcu_tasks detected stalls on tasks: 0000000088620d09: .. nvcsw: 6735/6735 holdout: 1 idle_cpu: -1/8 task:GlobalCPUThread state:R running task pid:2552016 tgid:2524552 Call Trace: shrink_lruvec mem_cgroup_iter shrink_node do_try_to_free_pages try_to_free_pages __alloc_frozen_pages_noprof alloc_pages_noprof pte_alloc_one __pte_alloc handle_mm_fault Nothing promises direct reclaim returns in bounded time, and the scan loop in shrink_lruvec() only calls cond_resched(), which is a no-op on PREEMPTION kernels. Involuntary preemption is not a Tasks-RCU quiescent state, so the reclaiming task never reports one and becomes a holdout. Upgrade it to cond_resched_tasks_rcu_qs(), which reports a quiescent state even when cond_resched() does nothing. PS: This has been discussed in [1]
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8315f42295d2667a7f942f154b73a86fd7cb2227 , < 4f50593c9cbc883d8c9b50148a3e8a8b1fd35f57 (git)
Affected: 8315f42295d2667a7f942f154b73a86fd7cb2227 , < 4cdc1bdf40944de5c6b118fef07ad23f07844338 (git)
Affected: 8315f42295d2667a7f942f154b73a86fd7cb2227 , < a67a00a70a7c8309ca47ea157ef3e8ed3d268f5b (git)
Affected: 8315f42295d2667a7f942f154b73a86fd7cb2227 , < 029c9408049f7f582230322057b7075bea594fd5 (git)
Affected: 8315f42295d2667a7f942f154b73a86fd7cb2227 , < b5391676c61d94ffe3272dcf6723738b802f79e8 (git)
Affected: 8315f42295d2667a7f942f154b73a86fd7cb2227 , < 3fd50239986302cb050d3649351bcec00fa9d5ab (git)
Affected: 8315f42295d2667a7f942f154b73a86fd7cb2227 , < cf3ba0911a1cf8680371ff113b90088edd01d2bb (git)
Affected: 8315f42295d2667a7f942f154b73a86fd7cb2227 , < 25f52e81216884a7444bf07a606691feb09a94e3 (git)
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Linux Linux Affected: 3.18
Unaffected: 0 , < 3.18 (semver)
Unaffected: 5.10.270 , ≤ 5.10.* (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.109 , ≤ 6.12.* (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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          "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]"
        }
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    "cveId": "CVE-2026-89753",
    "datePublished": "2026-09-11T19:46:56.806Z",
    "dateReserved": "2026-09-11T19:38:34.763Z",
    "dateUpdated": "2026-09-14T12:02:33.152Z",
    "state": "PUBLISHED"
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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\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"mm/vmscan.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"8315f42295d2667a7f942f154b73a86fd7cb2227\",\"lessThan\":\"4f50593c9cbc883d8c9b50148a3e8a8b1fd35f57\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8315f42295d2667a7f942f154b73a86fd7cb2227\",\"lessThan\":\"4cdc1bdf40944de5c6b118fef07ad23f07844338\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8315f42295d2667a7f942f154b73a86fd7cb2227\",\"lessThan\":\"a67a00a70a7c8309ca47ea157ef3e8ed3d268f5b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8315f42295d2667a7f942f154b73a86fd7cb2227\",\"lessThan\":\"029c9408049f7f582230322057b7075bea594fd5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8315f42295d2667a7f942f154b73a86fd7cb2227\",\"lessThan\":\"b5391676c61d94ffe3272dcf6723738b802f79e8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8315f42295d2667a7f942f154b73a86fd7cb2227\",\"lessThan\":\"3fd50239986302cb050d3649351bcec00fa9d5ab\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8315f42295d2667a7f942f154b73a86fd7cb2227\",\"lessThan\":\"cf3ba0911a1cf8680371ff113b90088edd01d2bb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8315f42295d2667a7f942f154b73a86fd7cb2227\",\"lessThan\":\"25f52e81216884a7444bf07a606691feb09a94e3\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"mm/vmscan.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.18\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.18\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.270\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.221\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.188\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.157\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.109\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.50\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.4\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/029c9408049f7f582230322057b7075bea594fd5\",\"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/4cdc1bdf40944de5c6b118fef07ad23f07844338\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4f50593c9cbc883d8c9b50148a3e8a8b1fd35f57\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a67a00a70a7c8309ca47ea157ef3e8ed3d268f5b\",\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-09-15T20:25:05+00:00",
      "cve": "CVE-2026-89753",
      "id": "CVE-2026-89753",
      "initial_release_date": "2026-09-11T00:00:00+00:00",
      "product_status:known_affected": "248",
      "product_status:known_not_affected": "28",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mm/vmscan: report RCU-tasks quiescent states in shrink_lruvec()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89753.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.