RHSA-2026:58545HighCVSS 7.3

Red Hat Security Advisory: libtiff security update

Published
August 24, 2026
Last Modified
August 24, 2026

🔗 CVE IDs covered (1)

CVE-2026-12912 →

📋 Description

CVE-2026-12912 — libtiff: libtiff: Heap-based buffer overflow via crafted PixarLog-compressed TIFF image

🎯 Affected products24

  • Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • libtiff-0:4.0.9-21.el8_6.3.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • libtiff-0:4.0.9-21.el8_6.3.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • libtiff-0:4.0.9-21.el8_6.3.src as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • libtiff-0:4.0.9-21.el8_6.3.src as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • libtiff-0:4.0.9-21.el8_6.3.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • libtiff-0:4.0.9-21.el8_6.3.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • libtiff-debuginfo-0:4.0.9-21.el8_6.3.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • libtiff-debuginfo-0:4.0.9-21.el8_6.3.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • libtiff-debuginfo-0:4.0.9-21.el8_6.3.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • libtiff-debuginfo-0:4.0.9-21.el8_6.3.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • libtiff-debugsource-0:4.0.9-21.el8_6.3.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • libtiff-debugsource-0:4.0.9-21.el8_6.3.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • libtiff-debugsource-0:4.0.9-21.el8_6.3.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • libtiff-debugsource-0:4.0.9-21.el8_6.3.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • libtiff-devel-0:4.0.9-21.el8_6.3.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • libtiff-devel-0:4.0.9-21.el8_6.3.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • libtiff-devel-0:4.0.9-21.el8_6.3.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • libtiff-devel-0:4.0.9-21.el8_6.3.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • libtiff-tools-debuginfo-0:4.0.9-21.el8_6.3.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • libtiff-tools-debuginfo-0:4.0.9-21.el8_6.3.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • libtiff-tools-debuginfo-0:4.0.9-21.el8_6.3.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • libtiff-tools-debuginfo-0:4.0.9-21.el8_6.3.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: To mitigate this issue, applications processing untrusted TIFF images should avoid explicitly configuring `PIXARLOGDATAFMT_8BITABGR` when decoding PixarLog-compressed TIFF images with three samples per pixel. This specific combination of output format and samples per pixel is required to trigger the heap-based buffer overflow.

🔗 References (4)