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.
CVSS Details
- CVSS 3.1 Base Score: 5.6
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade glibc | Jul 23, 2026 | Jul 23, 2026 |
| Suse | — | Upgrade glibcUpgrade glibc-profileUpgrade glibc-infoUpgrade glibc-extraUpgrade glibc-devel-staticUpgrade glibc-utilsUpgrade glibc-localeUpgrade glibc-gconv-modules-extraUpgrade glibc-langUpgrade glibc-locale-baseUpgrade glibc-develUpgrade glibc-htmlUpgrade glibc-i18ndata | Nov 5, 2025 | Nov 5, 2025 |
| Ubuntu | — | Upgrade libc6 | Jul 10, 2025 | Jun 5, 2025 |
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