CVE-2023-52932: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: mm/swapfile: add cond_resched() in get_swap_pages() The softlockup still occurs in get_swap_pages() under memory pressure. 64 CPU cores, 64GB memory, and 28 zram devices, the disksize of each zram device is 50MB with same priority as si. Use the stress-ng tool to increase memory pressure, causing the system to oom frequently. The plist_for_each_entry_safe() loops in get_swap_pages() could reach tens of thousands of times to find available space (extreme case: cond_resched() is not called in scan_swap_map_slots()). Let's add cond_resched() into get_swap_pages() when failed to find available space to avoid softlockup.

Affected products

• Linux Linux Kernel: before 4.14.306 (fixed in 4.14.306); from 4.15, before 4.19.273 (fixed in 4.19.273); from 4.20, before 5.4.232 (fixed in 5.4.232); from 5.5, before 5.10.168 (fixed in 5.10.168); from 5.11, before 5.15.93 (fixed in 5.15.93); from 5.16, before 6.1.11 (fixed in 6.1.11); …

Published 2025-03-27. Last modified 2026-06-17.