CVE-2025-8058

Severity: medium (CVSS 5.9 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-07-23 · updated 2026-06-17
Weakness: CWE-415

Description

The regcomp function in the GNU C library version from 2.4 to 2.41 is subject to a double free if some previous allocation fails. It can be accomplished either by a malloc failure or by using an interposed malloc that injects random malloc failures. The double free can allow buffer manipulation depending of how the regex is constructed. This issue affects all architectures and ABIs supported by the GNU C library.

Affected products

GNU C Library (glibc): from 2.4 before 2.42 — fixed in 2.42

How to fix

Upgrade to a fixed version: GNU C Library (glibc) 2.42. Check the vendor advisory for mitigations.

References

https://sourceware.org/bugzilla/show_bug.cgi?id=33185
https://sourceware.org/git/?p=glibc.git;a=commit;h=3ff17af18c38727b88d9115e536c069e6b5d601f
http://www.openwall.com/lists/oss-security/2025/07/23/1

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