CVE-2025-5702 Memory corruption in glibc

What is CVE-2025-5702?

CVE-2025-5702 is a medium-severity memory corruption vulnerability in Gnu Glibc, published on 5 Jun 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The strcmp implementation optimized for the Power10 processor in the GNU C Library version 2.39 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.

Weakness: CWE-665

Which versions are affected by CVE-2025-5702?

It affects 1 product.

Products include Gnu Glibc.

How do I fix CVE-2025-5702?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2025-5702 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-5702 exists.

Other vulnerabilities in Gnu Glibc

• CVE-2026-5450 scanf %mc off-by-one heap buffer overflow Critical 9.8
• CVE-2023-25139 Memory corruption in n/a Critical 9.8
• CVE-1999-0199 Other in n/a Critical 9.8
• CVE-2019-1010022 Security feature bypass in glibc Critical 9.8
• CVE-2005-3590 Memory corruption in n/a Critical 9.8

All Gnu Glibc vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALSA-2025:11066, ALSA-2025:9877, DEBIAN-CVE-2025-5702, GHSA-hqwp-qwfv-mhrx, MINI-8qf7-3jq4-43w3, MINI-qv64-wg56-gmf8 and 6 more.