Integer underflow in Linux kernel - CVE-2025-21860
Published: March 12, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU105673
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-21860
CWE-ID: CWE-191
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to integer underflow within the zswap_store_page() and zswap_store() functions in mm/zswap.c. A local user can execute arbitrary code.
Affected software
Linux kernel
How to mitigate CVE-2025-21860
Install update from vendor's website.
Linux kernel - update to 6.13.5