# CVE-2025-5745: glibc-source: The strncmp implementation optimized for the Power10 processor in the GNU CLibrary version 2.40 and later writes to v...

CVE-2025-5745 is fixed in 10 products on 1 platform, first by DEBIAN-CVE-2025-5745, released June 5, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-5745
- Priority: Routine
- CVSS: 5.6 (Medium)
- EPSS: 0.0027
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 5, 2025

## Description

The strncmp implementation optimized for the Power10 processor in the GNU CLibrary version 2.40 and later writes to vector registers v20 to v31without saving contents from the caller (those registers are defined asnon-volatile registers by the powerpc64le ABI), resulting in overwriting ofits contents and potentially altering control flow of the caller, orleaking the input strings to the function to other parts of the program.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | glibc Debian 13.5 (trixie) | 2.41-9 | [DEBIAN-CVE-2025-5745](https://patchblox.com/security/data/fix/linux/debian-cve-2025-5745.md) | Jun 5, 2025 |
| Linux | glibc Debian 14 | 2.41-9 | [DEBIAN-CVE-2025-5745](https://patchblox.com/security/data/fix/linux/debian-cve-2025-5745.md) | Jun 5, 2025 |
| Linux | glibc-source Ubuntu 25.04 (plucky) | 2.41-6ubuntu1.1 | [glibc-source 2.41-6ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-glibc-source-2.41-6ubuntu1.1.md) | Jan 16, 2026 |
| Linux | libc-bin Ubuntu 25.04 (plucky) | 2.41-6ubuntu1.1 | [libc-bin 2.41-6ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libc-bin-2.41-6ubuntu1.1.md) | Jan 16, 2026 |
| Linux | libc6 Ubuntu 25.04 (plucky) | 2.41-6ubuntu1.1 | [libc6 2.41-6ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libc6-2.41-6ubuntu1.1.md) | Jan 16, 2026 |
| Linux | libc6-amd64 Ubuntu 25.04 (plucky) | 2.41-6ubuntu1.1 | [libc6-amd64 2.41-6ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libc6-amd64-2.41-6ubuntu1.1.md) | Jan 16, 2026 |
| Linux | libc6-i386 Ubuntu 25.04 (plucky) | 2.41-6ubuntu1.1 | [libc6-i386 2.41-6ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libc6-i386-2.41-6ubuntu1.1.md) | Jan 16, 2026 |
| Linux | libc6-x32 Ubuntu 25.04 (plucky) | 2.41-6ubuntu1.1 | [libc6-x32 2.41-6ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-libc6-x32-2.41-6ubuntu1.1.md) | Jan 16, 2026 |
| Linux | locales Ubuntu 25.04 (plucky) | 2.41-6ubuntu1.1 | [locales 2.41-6ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-locales-2.41-6ubuntu1.1.md) | Jan 16, 2026 |
| Linux | locales-all Ubuntu 25.04 (plucky) | 2.41-6ubuntu1.1 | [locales-all 2.41-6ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-locales-all-2.41-6ubuntu1.1.md) | Jan 16, 2026 |
| Linux | nscd Ubuntu 25.04 (plucky) | 2.41-6ubuntu1.1 | [nscd 2.41-6ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-nscd-2.41-6ubuntu1.1.md) | Jan 16, 2026 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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