Amazon Linux 2 Security Advisory: ALAS2-2026-3143
Advisory Released Date: 2026-02-05
Advisory Updated Date: 2026-02-05
Severity:
Important
Issue Overview:
Stack-based buffer overflow in libtasn1 version: v4.20.0. The function fails to validate the size of input data resulting in a buffer overflow in asn1_expend_octet_string. (CVE-2025-13151)
Affected Packages:
libtasn1
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 libtasn1 or yum update --advisory ALAS2-2026-3143 to update your system.
New Packages:
aarch64:
libtasn1-4.10-1.amzn2.0.8.aarch64
libtasn1-devel-4.10-1.amzn2.0.8.aarch64
libtasn1-tools-4.10-1.amzn2.0.8.aarch64
libtasn1-debuginfo-4.10-1.amzn2.0.8.aarch64
i686:
libtasn1-4.10-1.amzn2.0.8.i686
libtasn1-devel-4.10-1.amzn2.0.8.i686
libtasn1-tools-4.10-1.amzn2.0.8.i686
libtasn1-debuginfo-4.10-1.amzn2.0.8.i686
src:
libtasn1-4.10-1.amzn2.0.8.src
x86_64:
libtasn1-4.10-1.amzn2.0.8.x86_64
libtasn1-devel-4.10-1.amzn2.0.8.x86_64
libtasn1-tools-4.10-1.amzn2.0.8.x86_64
libtasn1-debuginfo-4.10-1.amzn2.0.8.x86_64