CVE-2025-21931 — Improper Locking in Linux
Severity
5.5MEDIUMNVD
OSV3.2
EPSS
0.1%
top 78.43%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedApr 1
Latest updateMar 25
Description
In the Linux kernel, the following vulnerability has been resolved:
hwpoison, memory_hotplug: lock folio before unmap hwpoisoned folio
Commit b15c87263a69 ("hwpoison, memory_hotplug: allow hwpoisoned pages to
be offlined) add page poison checks in do_migrate_range in order to make
offline hwpoisoned page possible by introducing isolate_lru_page and
try_to_unmap for hwpoisoned page. However folio lock must be held before
calling try_to_unmap. Add it to fix this problem.
Warning will be produce…
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6