- —Not scoredno CVSS score yet
- 0.18%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: mm: memcg: stop reclaim when a limit update is superseded kernfs serializes file operations only per open file, so separate open files can update the same memory.high or memory.max file concurrently. Both handlers store the new limit before synchronous reclaim, but continue to use the writer's local target in the reclaim loop. If another writer raises or removes the limit, the first writer can continue reclaiming toward a stale target. For memory.max, this can leave the writer looping indefinitely once reclaim retries are exhausted. The OOM path sees sufficient margin under the current limit and returns true without killing, while the writer still compares usage against its stale target and records another OOM event. Check the current limit at the start of each reclaim iteration and stop if it no longer matches the writer's target. Reproducer: Populate a cgroup with anonymous memory and disable swapping. Lower memory.max from one open file, then restore it to "max" through another open file after the new limit becomes visible. Without the patch, the first writer remains blocked and repeatedly increments the OOM event counter. With the patch, it returns normally. This was not motivated by a reported production workload. We found it through automated randomized testing for our cgroup observability work and reduced it to the reproducer above.
Timeline
ID reserved
By Linux
Published
- 38 days later
· 38 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.18% · top 93% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected b6e6edcfa40561e9c8abe5eecf1c96f8e5fd9c6f – < ebf762a393630d1582645be3f0fc22a674eb9122
- affected b6e6edcfa40561e9c8abe5eecf1c96f8e5fd9c6f – < 4ea0617b9e46d26c0a3e5af00308ea1931cc545d
- affected b6e6edcfa40561e9c8abe5eecf1c96f8e5fd9c6f – < 5c6f87d33733d96fba66ea4e78cd8b24b4d60a49
- affected b6e6edcfa40561e9c8abe5eecf1c96f8e5fd9c6f – < 8bf21ad3657305e28deafd9ef16a121407496bc3
- affected b6e6edcfa40561e9c8abe5eecf1c96f8e5fd9c6f – < 39ec1e4183a718f448b2e9de681dcbdda18fce42
- affected b6e6edcfa40561e9c8abe5eecf1c96f8e5fd9c6f – < 95d87030cae7764805aa7c621c52871139297cb0
- affected b6e6edcfa40561e9c8abe5eecf1c96f8e5fd9c6f – < aab391074de96ed601eeca32daef9a8507d436d9
- affected b6e6edcfa40561e9c8abe5eecf1c96f8e5fd9c6f – < 9477820c63cbf4d97114238f3d1ff10dfd6bee3f
- affected 0ccab5b139971a2a3f48df24d1ee8be2dbf84042
- affected 97729c37439040ec07807f0dbb71ea60ccbafd27
- affected 4.4.7 – < 4.5
- affected 4.5.1 – < 4.6
- affected 4.6
- unaffected < 4.6
- unaffected 5.10.270 – ≤ 5.10.*
- unaffected 5.15.221 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/ebf762a393630d1582645be3f0fc22a674eb9122 (opens in a new tab)
- https://git.kernel.org/stable/c/4ea0617b9e46d26c0a3e5af00308ea1931cc545d (opens in a new tab)
- https://git.kernel.org/stable/c/5c6f87d33733d96fba66ea4e78cd8b24b4d60a49 (opens in a new tab)
- https://git.kernel.org/stable/c/8bf21ad3657305e28deafd9ef16a121407496bc3 (opens in a new tab)
- https://git.kernel.org/stable/c/39ec1e4183a718f448b2e9de681dcbdda18fce42 (opens in a new tab)
- https://git.kernel.org/stable/c/95d87030cae7764805aa7c621c52871139297cb0 (opens in a new tab)
- https://git.kernel.org/stable/c/aab391074de96ed601eeca32daef9a8507d436d9 (opens in a new tab)
- https://git.kernel.org/stable/c/9477820c63cbf4d97114238f3d1ff10dfd6bee3f (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-76664 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-89752)Record last updated .