RHSA-2026:19659HighCVSS 7.8

Red Hat Security Advisory: libtiff security update

Published
May 20, 2026
Last Modified
October 2, 2026

🔗 CVE IDs covered (1)

CVE-2026-4775 →

📋 Description

CVE-2026-4775 — libtiff: libtiff: Arbitrary code execution or denial of service via signed integer overflow in TIFF file processing

🎯 Affected products24

  • Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • libtiff-0:4.0.9-18.el8_4.2.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • libtiff-0:4.0.9-18.el8_4.2.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • libtiff-0:4.0.9-18.el8_4.2.src as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • libtiff-0:4.0.9-18.el8_4.2.src as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • libtiff-0:4.0.9-18.el8_4.2.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • libtiff-0:4.0.9-18.el8_4.2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • libtiff-debuginfo-0:4.0.9-18.el8_4.2.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • libtiff-debuginfo-0:4.0.9-18.el8_4.2.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • libtiff-debuginfo-0:4.0.9-18.el8_4.2.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • libtiff-debuginfo-0:4.0.9-18.el8_4.2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • libtiff-debugsource-0:4.0.9-18.el8_4.2.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • libtiff-debugsource-0:4.0.9-18.el8_4.2.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • libtiff-debugsource-0:4.0.9-18.el8_4.2.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • libtiff-debugsource-0:4.0.9-18.el8_4.2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • libtiff-devel-0:4.0.9-18.el8_4.2.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • libtiff-devel-0:4.0.9-18.el8_4.2.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • libtiff-devel-0:4.0.9-18.el8_4.2.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • libtiff-devel-0:4.0.9-18.el8_4.2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • libtiff-tools-debuginfo-0:4.0.9-18.el8_4.2.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • libtiff-tools-debuginfo-0:4.0.9-18.el8_4.2.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • libtiff-tools-debuginfo-0:4.0.9-18.el8_4.2.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • libtiff-tools-debuginfo-0:4.0.9-18.el8_4.2.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)

✅ 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, avoid processing untrusted or maliciously crafted TIFF files with applications linked against the libtiff library. If processing untrusted TIFF files is unavoidable, consider running the affected applications within a sandboxed environment to limit the potential impact of successful exploitation. This operational control helps contain the effects of an out-of-bounds write, reducing the risk of denial of service or arbitrary code execution.

🔗 References (4)