Amazon Linux 2 Security Advisory: ALAS2-2026-3257
Advisory Released Date: 2026-04-30
Advisory Updated Date: 2026-04-30
Severity:
Important
Issue Overview:
A flaw was found in libarchive. On 32-bit systems, an integer overflow vulnerability exists in the zisofs block pointer allocation logic. A remote attacker can exploit this by providing a specially crafted ISO9660 image, which can lead to a heap buffer overflow. This could potentially allow for arbitrary code execution on the affected system. (CVE-2026-5121)
Affected Packages:
libarchive
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 libarchive or yum update --advisory ALAS2-2026-3257 to update your system.
New Packages:
aarch64:
libarchive-3.1.2-14.amzn2.0.6.aarch64
libarchive-devel-3.1.2-14.amzn2.0.6.aarch64
bsdtar-3.1.2-14.amzn2.0.6.aarch64
bsdcpio-3.1.2-14.amzn2.0.6.aarch64
libarchive-debuginfo-3.1.2-14.amzn2.0.6.aarch64
i686:
libarchive-3.1.2-14.amzn2.0.6.i686
libarchive-devel-3.1.2-14.amzn2.0.6.i686
bsdtar-3.1.2-14.amzn2.0.6.i686
bsdcpio-3.1.2-14.amzn2.0.6.i686
libarchive-debuginfo-3.1.2-14.amzn2.0.6.i686
src:
libarchive-3.1.2-14.amzn2.0.6.src
x86_64:
libarchive-3.1.2-14.amzn2.0.6.x86_64
libarchive-devel-3.1.2-14.amzn2.0.6.x86_64
bsdtar-3.1.2-14.amzn2.0.6.x86_64
bsdcpio-3.1.2-14.amzn2.0.6.x86_64
libarchive-debuginfo-3.1.2-14.amzn2.0.6.x86_64