Amazon Linux 2 Security Advisory: ALAS2-2026-3170
Advisory Released Date: 2026-02-19
Advisory Updated Date: 2026-02-19
Severity:
Medium
Issue Overview:
In libexpat before 2.7.4, the doContent function does not properly determine the buffer size bufSize because there is no integer overflow check for tag buffer reallocation. (CVE-2026-25210)
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 ALAS2-2026-3170 to update your system.
New Packages:
aarch64:
expat-2.1.0-15.amzn2.0.6.aarch64
expat-devel-2.1.0-15.amzn2.0.6.aarch64
expat-static-2.1.0-15.amzn2.0.6.aarch64
expat-debuginfo-2.1.0-15.amzn2.0.6.aarch64
i686:
expat-2.1.0-15.amzn2.0.6.i686
expat-devel-2.1.0-15.amzn2.0.6.i686
expat-static-2.1.0-15.amzn2.0.6.i686
expat-debuginfo-2.1.0-15.amzn2.0.6.i686
src:
expat-2.1.0-15.amzn2.0.6.src
x86_64:
expat-2.1.0-15.amzn2.0.6.x86_64
expat-devel-2.1.0-15.amzn2.0.6.x86_64
expat-static-2.1.0-15.amzn2.0.6.x86_64
expat-debuginfo-2.1.0-15.amzn2.0.6.x86_64