CVE-2026-89759 - mm/kmemleak: avoid soft lockup when scanning task stacks
Brief
CVE ID : CVE-2026-89759
Published : Sept. 11, 2026, 8:20 p. m.
- 32 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved:
mm/kmemleak: avoid soft lockup when scanning task stacks
Patch series "mm/kmemleak: avoid soft lockup when scanning task", v3.
kmemleak_scan() scans every task stack under one rcu_read_lock() with no reschedule point, which can trip the soft lockup watchdog on hosts with very many threads.
That prints the following message, depending on the workload+host configuration: