CVE-2025-21789

LoongArch: csum: Fix OoB access in IP checksum code for negative lengths

Description

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.

Category

7.1
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.02%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/964a8895704a22efc06a2a3276b624a5ae985a06 patch mailing list
https://git.kernel.org/stable/c/9f15a8df542c0f08732a67d1a14ee7c22948fb97 patch mailing list
https://git.kernel.org/stable/c/d6508ffff32b44b6d0de06704034e4eef1c307a7 patch mailing list
https://git.kernel.org/stable/c/6287f1a8c16138c2ec750953e35039634018c84a patch mailing list

Frequently Asked Questions

What is the severity of CVE-2025-21789?
CVE-2025-21789 has been scored as a high severity vulnerability.
How to fix CVE-2025-21789?
To fix CVE-2025-21789, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-21789 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-21789 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-21789?
CVE-2025-21789 affects Linux Linux, Linux Linux.
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