CVE-2026-89753mm/vmscan: report RCU-tasks quiescent states in shrink_lruvec()
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No exploitation reported and no EPSS estimate yet.
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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]
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 8315f42295d2667a7f942f154b73a86fd7cb2227 builds before 4f50593c9cbc883d8c9b50148a3e8a8b1fd35f57; 8315f42295d2667a7f942f154b73a86fd7cb2227 builds before 4cdc1bdf40944de5c6b118fef07ad23f07844338; from 8315f42295d2667a7f942f154b73a86fd7cb2227 before a67a00a70a7c8309ca47ea157ef3e8ed3d268f5b; 8315f42295d2667a7f942f154b73a86fd7cb2227 builds before 029c9408049f7f582230322057b7075bea594fd5; from 8315f42295d2667a7f942f154b73a86fd7cb2227 before b5391676c61d94ffe3272dcf6723738b802f79e8; 8315f42295d2667a7f942f154b73a86fd7cb2227 builds before 3fd50239986302cb050d3649351bcec00fa9d5ab; from 8315f42295d2667a7f942f154b73a86fd7cb2227 before cf3ba0911a1cf8680371ff113b90088edd01d2bb; 8315f42295d2667a7f942f154b73a86fd7cb2227 builds before 25f52e81216884a7444bf07a606691feb09a94e3 | CNA record |
References
- https://git.kernel.org/stable/c/4f50593c9cbc883d8c9b50148a3e8a8b1fd35f57
- https://git.kernel.org/stable/c/4cdc1bdf40944de5c6b118fef07ad23f07844338
- https://git.kernel.org/stable/c/a67a00a70a7c8309ca47ea157ef3e8ed3d268f5b
- https://git.kernel.org/stable/c/029c9408049f7f582230322057b7075bea594fd5
- https://git.kernel.org/stable/c/b5391676c61d94ffe3272dcf6723738b802f79e8
- https://git.kernel.org/stable/c/3fd50239986302cb050d3649351bcec00fa9d5ab
- https://git.kernel.org/stable/c/cf3ba0911a1cf8680371ff113b90088edd01d2bb
- https://git.kernel.org/stable/c/25f52e81216884a7444bf07a606691feb09a94e3
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.