CVE-2025-21789
kernel: LoongArch: csum: Fix OoB access in IP checksum code for negative lengths
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · February 27, 2025
Updated · September 13, 2026
Description
A flaw was found in the Linux kernel, specifically within the IP checksum code for the LoongArch architecture. A local attacker could exploit an out-of-bounds read vulnerability, caused by an undefined shift when handling negative lengths. This could lead to unauthorized information disclosure and potentially a denial of service.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE-125 · Out-of-bounds Read