[USN-7541-1] GNU C Library vulnerability

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Ubuntu Security Notice USN-7541-1
May 28, 2025

glibc vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

GNU C Library could be made to crash or run programs if it processed
specially crafted dynamically shared library.

Software Description:
- glibc: GNU C Library

Details:

It was discovered that the GNU C Library incorrectly search LD_LIBRARY_PATH
to determine which library to load when statically linked setuid binary
calls dlopen. A local attacker could possibly use this issue to cause a
denial of service or execute arbitrary code.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS
libc6 2.35-0ubuntu3.10

Ubuntu 20.04 LTS
libc6 2.31-0ubuntu9.18

Ubuntu 18.04 LTS
libc6 2.27-3ubuntu1.6+esm5
Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-7541-1
CVE-2025-4802

Package Information:
https://launchpad.net/ubuntu/+source/glibc/2.35-0ubuntu3.10
https://launchpad.net/ubuntu/+source/glibc/2.31-0ubuntu9.18