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.
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
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| glibc · Debian 13.5 (trixie) | 2.41-9 | DEBIAN-CVE-2025-5745 | Jun 5, 2025 |
| glibc · Debian 14 | 2.41-9 | DEBIAN-CVE-2025-5745 | Jun 5, 2025 |
| glibc-source · Ubuntu 25.04 (plucky) | 2.41-6ubuntu1.1 | glibc-source 2.41-6ubuntu1.1 | Jan 16, 2026 |
| libc-bin · Ubuntu 25.04 (plucky) | 2.41-6ubuntu1.1 | libc-bin 2.41-6ubuntu1.1 | Jan 16, 2026 |
| libc6 · Ubuntu 25.04 (plucky) | 2.41-6ubuntu1.1 | libc6 2.41-6ubuntu1.1 | Jan 16, 2026 |
| libc6-amd64 · Ubuntu 25.04 (plucky) | 2.41-6ubuntu1.1 | libc6-amd64 2.41-6ubuntu1.1 | Jan 16, 2026 |
| libc6-i386 · Ubuntu 25.04 (plucky) | 2.41-6ubuntu1.1 | libc6-i386 2.41-6ubuntu1.1 | Jan 16, 2026 |
| libc6-x32 · Ubuntu 25.04 (plucky) | 2.41-6ubuntu1.1 | libc6-x32 2.41-6ubuntu1.1 | Jan 16, 2026 |
| locales · Ubuntu 25.04 (plucky) | 2.41-6ubuntu1.1 | locales 2.41-6ubuntu1.1 | Jan 16, 2026 |
| locales-all · Ubuntu 25.04 (plucky) | 2.41-6ubuntu1.1 | locales-all 2.41-6ubuntu1.1 | Jan 16, 2026 |
| nscd · Ubuntu 25.04 (plucky) | 2.41-6ubuntu1.1 | nscd 2.41-6ubuntu1.1 | Jan 16, 2026 |
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