CVE-2025-21789

7.1 highEPSS 0.2%

High (7.1) in linux linux kernel. EPSS 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: LoongArch: csum: Fix OoB access in IP checksum code for negative lengths Commit 69e3a6aa6be2 ("LoongArch: Add checksum optimization for 64-bit system") would cause an undefined shift and an out-of-bounds read. Commit 8bd795fedb84 ("arm64: csum: Fix OoB access in IP checksum code for negative lengths") fixes the same issue on ARM64.

Severity

CVSS 3.1

7.1 high

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 13% of CVEs (scores of 2026-10-31)
CWE: CWE-125
Published: 2025-02-27
Modified: 2026-07-30
Record from: the NVD, synced 2026-10-19

Affected

linux:linux_kernel

References

https://git.kernel.org/stable/c/6287f1a8c16138c2ec750953e35039634018c84a
https://git.kernel.org/stable/c/964a8895704a22efc06a2a3276b624a5ae985a06
https://git.kernel.org/stable/c/9f15a8df542c0f08732a67d1a14ee7c22948fb97
https://git.kernel.org/stable/c/d6508ffff32b44b6d0de06704034e4eef1c307a7

Check your stack JSON