Amazon Linux 2 Security Advisory: ALAS2-2026-3822
Advisory Released Date: 2026-07-20
Advisory Updated Date: 2026-07-20
Severity:
Important
Issue Overview:
A flaw was found in libtiff. A remote attacker could exploit this vulnerability by providing a specially crafted PixarLog-compressed TIFF image. This issue occurs when decoding Pixarlog codec images with the PIXARLOGDATAFMT_8BITABGR output format and a specific stride value, leading to a heap-based buffer overflow. This could potentially result in arbitrary code execution or a denial of service (DoS). (CVE-2026-12912)
Affected Packages:
compat-libtiff3
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 compat-libtiff3 or yum update --advisory ALAS2-2026-3822 to update your system.
New Packages:
aarch64:
compat-libtiff3-3.9.4-12.amzn2.0.10.aarch64
compat-libtiff3-debuginfo-3.9.4-12.amzn2.0.10.aarch64
i686:
compat-libtiff3-3.9.4-12.amzn2.0.10.i686
compat-libtiff3-debuginfo-3.9.4-12.amzn2.0.10.i686
src:
compat-libtiff3-3.9.4-12.amzn2.0.10.src
x86_64:
compat-libtiff3-3.9.4-12.amzn2.0.10.x86_64
compat-libtiff3-debuginfo-3.9.4-12.amzn2.0.10.x86_64