Amazon Linux 2 Security Advisory: ALAS2-2026-3495
Advisory Released Date: 2026-07-08
Advisory Updated Date: 2026-07-08
Severity:
Important
Issue Overview:
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. (CVE-2026-56132)
Affected Packages:
expat
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update expat or yum update --advisory ALAS2-2026-3495 to update your system.
New Packages:
aarch64:
expat-2.1.0-15.amzn2.0.7.aarch64
expat-devel-2.1.0-15.amzn2.0.7.aarch64
expat-static-2.1.0-15.amzn2.0.7.aarch64
expat-debuginfo-2.1.0-15.amzn2.0.7.aarch64
i686:
expat-2.1.0-15.amzn2.0.7.i686
expat-devel-2.1.0-15.amzn2.0.7.i686
expat-static-2.1.0-15.amzn2.0.7.i686
expat-debuginfo-2.1.0-15.amzn2.0.7.i686
src:
expat-2.1.0-15.amzn2.0.7.src
x86_64:
expat-2.1.0-15.amzn2.0.7.x86_64
expat-devel-2.1.0-15.amzn2.0.7.x86_64
expat-static-2.1.0-15.amzn2.0.7.x86_64
expat-debuginfo-2.1.0-15.amzn2.0.7.x86_64