PT-2026-33851 · Glibc · Glibc

Rocket Ma · Published 2026-04-20 · Updated 2026-05-22 · CVE-2026-5450

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions glibc versions 2.7 through 2.43

Description Calling the scanf family of functions using a %mc (malloc'd character match) with a format width specifier that has an explicit width greater than 1024 can lead to a one byte heap buffer overflow.

Recommendations Update glibc to a version later than 2.43.

Exploit

Fix

Memory Corruption

Heap Based Buffer Overflow

Weakness Enumeration

CWE-787

CWE-122

Related Identifiers

CVE-2026-5450

ECHO-56EB-505F-7A61

OESA-2026-2409

OESA-2026-2410

OESA-2026-2411

OESA-2026-2412

OPENSUSE-SU-2026:10770-1

RHSA-2026:12740

Affected Products

Glibc

References · 27

• 🔥 https://sourceware.org/bugzilla/show_bug.cgi?id=CVE-2026-5450 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-5450 · Security Note
• https://osv.dev/vulnerability/OESA-2026-2412 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-5450 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-5450 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2411 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-5928 · Security Note
• https://osv.dev/vulnerability/OESA-2026-2409 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-5450 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2410 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10770-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-5450 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-5450 · Vendor Advisory
• https://suse.com/security/cve/CVE-2026-5450 · Note
• https://twitter.com/CVEnew/status/2046571893315207479 · Twitter Post