CVE-2026-89753: Linux vulnerability

CVE-2026-89753: mm/vmscan: report RCU-tasks quiescent states in shrink_lruvec()

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]

UnknownCVSS not scoredNot KEV-listedUpdatedOct 19, 2026, 08:52 UTC (UTC+00:00)

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Sep 11, 2026, 19:46 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

3Timeline events

0ADP providers

9Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
Sep 11, 2026, 19:38 UTC (UTC+00:00)
CVE publishedCVE Program
The CVE record was published.
Sep 11, 2026, 19:46 UTC (UTC+00:00)
CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Oct 19, 2026, 08:52 UTC (UTC+00:00)

Source materials

CVE List V5 sourceCVE List V5
https://git.kernel.org/stable/c/4f50593c9cbc883d8c9b50148a3e8a8b1fd35f57CVE reference, Linux
https://git.kernel.org/stable/c/4cdc1bdf40944de5c6b118fef07ad23f07844338CVE reference, Linux
https://git.kernel.org/stable/c/a67a00a70a7c8309ca47ea157ef3e8ed3d268f5bCVE reference, Linux
https://git.kernel.org/stable/c/029c9408049f7f582230322057b7075bea594fd5CVE reference, Linux
https://git.kernel.org/stable/c/b5391676c61d94ffe3272dcf6723738b802f79e8CVE reference, Linux
https://git.kernel.org/stable/c/3fd50239986302cb050d3649351bcec00fa9d5abCVE reference, Linux
https://git.kernel.org/stable/c/cf3ba0911a1cf8680371ff113b90088edd01d2bbCVE reference, Linux
https://git.kernel.org/stable/c/25f52e81216884a7444bf07a606691feb09a94e3CVE reference, Linux

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

LinuxLinux8315f42295d2667a7f942f154b73a86fd7cb2227, 8315f42295d2667a7f942f154b73a86fd7cb2227, 8315f42295d2667a7f942f154b73a86fd7cb2227, 8315f42295d2667a7f942f154b73a86fd7cb2227, 8315f42295d2667a7f942f154b73a86fd7cb2227, 8315f42295d2667a7f942f154b73a86fd7cb2227, 8315f42295d2667a7f942f154b73a86fd7cb2227, 8315f42295d2667a7f942f154b73a86fd7cb2227unaffected

LinuxLinux3.18, 0, 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50, 7.2.4, 7.3affected

Weakness

CWE details

No CWE listed

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