Out-of-bounds Write Affecting glibc-2.43 package, versions <2.43-r7


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.5% (40th percentile)

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  • Snyk IDSNYK-WOLFILATEST-GLIBC243-19129391
  • published21 Aug 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 Wolfi glibc-2.43 to version 2.43-r7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream glibc-2.43 package and not the glibc-2.43 package as distributed by Wolfi. See How to fix? for Wolfi 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