Amazon Linux 2023 Security Advisory: ALAS2023-2026-1900
Advisory Released Date: 2026-07-07
Advisory Updated Date: 2026-07-07
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
Issue Correction:
Run dnf update expat --releasever 2023.12.20260706 or dnf update --advisory ALAS2023-2026-1900 --releasever 2023.12.20260706 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
New Packages:
aarch64:
expat-debuginfo-2.6.3-1.amzn2023.0.5.aarch64
expat-2.6.3-1.amzn2023.0.5.aarch64
expat-debugsource-2.6.3-1.amzn2023.0.5.aarch64
expat-static-2.6.3-1.amzn2023.0.5.aarch64
expat-devel-2.6.3-1.amzn2023.0.5.aarch64
src:
expat-2.6.3-1.amzn2023.0.5.src
x86_64:
expat-debuginfo-2.6.3-1.amzn2023.0.5.x86_64
expat-static-2.6.3-1.amzn2023.0.5.x86_64
expat-2.6.3-1.amzn2023.0.5.x86_64
expat-devel-2.6.3-1.amzn2023.0.5.x86_64
expat-debugsource-2.6.3-1.amzn2023.0.5.x86_64