CVE-2025-5745: glibc (CVSS 5.6)

Description

The strncmp implementation optimized for the Power10 processor in the GNU C Library version 2.40 and later writes to vector registers v20 to v31 without saving contents from the caller (those registers are defined as non-volatile registers by the powerpc64le ABI), resulting in overwriting of its contents and potentially altering control flow of the caller, or leaking the input strings to the function to other parts of the program.

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CVSS v3.1 Score

5.6

MEDIUM

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

Weakness Type (CWE)

CWE-665 CWE-665

Affected Products

Vendor	Product	Versions
gnu	glibc	2.40 — 2.40-136
gnu	glibc	2.41 — 2.41-57

References

Other References

https://sourceware.org/bugzilla/show_bug.cgi?id=33060

Frequently Asked Questions

What is CVE-2025-5745? +

The strncmp implementation optimized for the Power10 processor in the GNU C Library version 2.40 and later writes to vector registers v20 to v31 without saving contents from the caller (those registers are defined as non-volatile registers by the powerpc64le ABI), resulting in overwriting of its contents and potentially altering control flow of the caller, or leaking the input strings to the function to other parts of the program. It has a CVSS v3.1 base score of 5.6 (MEDIUM).

How severe is CVE-2025-5745? +

CVE-2025-5745 has a CVSS v3.1 score of 5.6 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-5745? +

CVE-2025-5745 affects products from gnu, specifically: glibc. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-5745? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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