Incorrect Synchronization Affecting expat-devel package, versions <0:2.5.0-2.el8_10.2


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.1% (2nd percentile)

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  • Snyk IDSNYK-ALMALINUX8-EXPATDEVEL-19651714
  • published9 Sept 2026
  • disclosed8 Sept 2026

Introduced: 8 Sep 2026

NewCVE-2026-56132  (opens in a new tab)
CWE-821  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 expat-devel to version 0:2.5.0-2.el8_10.2 or higher.
This issue was patched in ALSA-2026:64809.

NVD Description

Note: Versions mentioned in the description apply only to the upstream expat-devel package and not the expat-devel package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers.

CVSS Base Scores

version 3.1