Amazon Linux 2023 Security Advisory: ALAS2023-2026-1983
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)
Denial of Service via large SamplesPerPixel tag (CVE-2026-36849)
Affected Packages:
libtiff
Issue Correction:
Run dnf update libtiff --releasever 2023.12.20260720 or dnf update --advisory ALAS2023-2026-1983 --releasever 2023.12.20260720 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:
libtiff-debuginfo-4.4.0-4.amzn2023.0.27.aarch64
libtiff-tools-4.4.0-4.amzn2023.0.27.aarch64
libtiff-debugsource-4.4.0-4.amzn2023.0.27.aarch64
libtiff-tools-debuginfo-4.4.0-4.amzn2023.0.27.aarch64
libtiff-static-4.4.0-4.amzn2023.0.27.aarch64
libtiff-4.4.0-4.amzn2023.0.27.aarch64
libtiff-devel-4.4.0-4.amzn2023.0.27.aarch64
src:
libtiff-4.4.0-4.amzn2023.0.27.src
x86_64:
libtiff-debugsource-4.4.0-4.amzn2023.0.27.x86_64
libtiff-4.4.0-4.amzn2023.0.27.x86_64
libtiff-static-4.4.0-4.amzn2023.0.27.x86_64
libtiff-debuginfo-4.4.0-4.amzn2023.0.27.x86_64
libtiff-tools-4.4.0-4.amzn2023.0.27.x86_64
libtiff-tools-debuginfo-4.4.0-4.amzn2023.0.27.x86_64
libtiff-devel-4.4.0-4.amzn2023.0.27.x86_64