Integer Overflow or Wraparound Affecting expat package, versions <0:2.5.0-6.el8_10


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.37% (31st percentile)

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  • Snyk IDSNYK-ALMALINUX8-EXPAT-21873767
  • published30 Oct 2026
  • disclosed22 Oct 2026

Introduced: 22 Oct 2026

NewCVE-2026-102633  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 expat to version 0:2.5.0-6.el8_10 or higher.
This issue was patched in ALSA-2026:92323.

NVD Description

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

libexpat versions 2.7.2 through 2.8.5 contain an integer overflow vulnerability in expat_realloc() function on 32-bit platforms when computing allocation sizes. Attackers supplying malicious XML to applications parsing with vulnerable libexpat can cause heap buffer overflow, memory corruption, or denial of service.

CVSS Base Scores

version 3.1