Out-of-bounds Write Affecting glibc package, versions <2.43-2ubuntu2.3


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.5% (40th percentile)

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  • Snyk IDSNYK-UBUNTU2604-GLIBC-16238960
  • published27 Jul 2026
  • disclosed20 Apr 2026

Introduced: 20 Apr 2026

CVE-2026-5450  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Ubuntu:26.04 glibc to version 2.43-2ubuntu2.3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc package and not the glibc package as distributed by Ubuntu. See How to fix? for Ubuntu:26.04 relevant fixed versions and status.

Calling the scanf family of functions with a %mc (malloc'd character match) in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow.

CVSS Base Scores

version 3.1