CVE-2025-8058: Double Free

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.

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Weakness Type (CWE)

CWE-415 CWE-415

References

Other 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

Frequently Asked Questions

What is CVE-2025-8058? +

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.

How do I check if I'm vulnerable to CVE-2025-8058? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2025-8058