Out-of-bounds Read Affecting libexpat-devel package, versions <2.8.5-150400.3.40.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.35% (27th percentile)

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  • Snyk IDSNYK-SLES155-LIBEXPATDEVEL-20876843
  • published13 Oct 2026
  • disclosed12 Oct 2026

Introduced: 12 Oct 2026

NewCVE-2026-76641  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade SLES:15.5 libexpat-devel to version 2.8.5-150400.3.40.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libexpat-devel package and not the libexpat-devel package as distributed by SLES. See How to fix? for SLES:15.5 relevant fixed versions and status.

Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption by processing XML with external entity parsers created via XML_ExternalEntityParserCreate. A struct size mismatch between ELEMENT_TYPE members causes storeAtts to read the attIndex member past allocated memory boundaries, resulting in failure to normalize whitespace in non-CDATA attributes or a wild pointer dereference causing a segfault. This vulnerability was introduced by the fix for CVE-2026-66046.

CVSS Base Scores

version 3.1