CVE-2026-89759Medium· 5.5▾ SunlitA flaw was found in the Linux kernel's memory leak detector (kmemleak). When kmemleak_scan() attempts to scan task stacks on systems with a large number of threads, it can hold a CPU for an extended period without allowing other processes …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.2%
— → 4.7
none → medium
— → 4.7
none → medium
Last analysed / modified upstream
— → 5.5
none → medium
A flaw was found in the Linux kernel's memory leak detector (kmemleak). When kmemleak_scan() attempts to scan task stacks on systems with a large number of threads, it can hold a CPU for an extended period without allowing other processes to run. This can lead to a 'soft lockup,' where the system becomes unresponsive, effectively causing a Denial of Service (DoS).
kernel: mm/kmemleak: avoid soft lockup when scanning task stacks — rated Low by Red Hat. Released 2026-09-11, updated 2026-09-15.
Affected:
No fix planned:
Not affected:
Out of support scope
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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