PT-2026-33850 · Glibc · Glibc

Rahul Hoysala · Published 2026-04-20 · Updated 2026-04-28 · CVE-2026-5358

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Name of the Vulnerable Software and Affected Versions glibc versions prior to 2.44

Description The obsolete nis local principal() function may overflow a buffer in the data section. This allows 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 (Network Information Service) is a legacy system for distributing configuration data across a network.

Recommendations Update to a version newer than 2.43. Port applications away from NIS to more modern identity and access management services.

Exploit

Fix

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

CVE-2026-5358

ECHO-83A2-A00B-6C15

Affected Products

Glibc

References · 12

• 🔥 https://sourceware.org/bugzilla/show_bug.cgi?id=34067 · Exploit
• https://security-tracker.debian.org/tracker/CVE-2026-5358 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-5358 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-5358 · Security Note
• https://ubuntu.com/security/CVE-2026-5358 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-5358 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-5358 · Vendor Advisory
• https://twitter.com/CVEnew/status/2046571895273979952 · Twitter Post
• https://twitter.com/oss_security/status/2046374003401511317 · Twitter Post
• https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=advisories/GLIBC-SA-2026-0008 · Note
• https://twitter.com/vitobotta/status/2049141812900618489 · Twitter Post
• https://twitter.com/the_yellow_fall/status/2046617203261468975 · Twitter Post