Bug#1134542: glibc: CVE-2026-5358

Source: glibc
Version: 2.42-15
Severity: important
Tags: security upstream
Forwarded: https://sourceware.org/bugzilla/show_bug.cgi?id=34067
X-Debbugs-Cc: [email protected], Debian Security Team <[email protected]>

Hi,

The following vulnerability was published for glibc.

CVE-2026-5358[0]:
| The obsolete nis_local_principal function in the GNU C Library
| version 2.43 and older may overflow a buffer in the data section,
| which could allow an attacker to spoof a crafted response to a UDP
| request generated by this function and overwrite neighboring static
| data in the requesting application.  NIS support is obsolete and has
| been deprecated in the GNU C Library since version 2.26 and is only
| maintained for legacy usage. Applications should port away from NIS
| to more modern identity and access management services.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-5358
    https://www.cve.org/CVERecord?id=CVE-2026-5358
[1] https://sourceware.org/bugzilla/show_bug.cgi?id=34067
[2] https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=advisories/GLIBC-SA-2026-0008

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore