RHSA-2026:42668HighCVSS 7.3

Red Hat Security Advisory: libtiff security update

Published
July 21, 2026
Last Modified
August 5, 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 products44

  • Red Hat Enterprise Linux AppStream (v. 9)
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • libtiff-0:4.4.0-18.el9_8.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libtiff-0:4.4.0-18.el9_8.1.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libtiff-0:4.4.0-18.el9_8.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libtiff-0:4.4.0-18.el9_8.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libtiff-0:4.4.0-18.el9_8.1.src as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libtiff-0:4.4.0-18.el9_8.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libtiff-debuginfo-0:4.4.0-18.el9_8.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libtiff-debuginfo-0:4.4.0-18.el9_8.1.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • libtiff-debuginfo-0:4.4.0-18.el9_8.1.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libtiff-debuginfo-0:4.4.0-18.el9_8.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libtiff-debuginfo-0:4.4.0-18.el9_8.1.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • libtiff-debuginfo-0:4.4.0-18.el9_8.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libtiff-debuginfo-0:4.4.0-18.el9_8.1.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • libtiff-debuginfo-0:4.4.0-18.el9_8.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libtiff-debuginfo-0:4.4.0-18.el9_8.1.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • libtiff-debugsource-0:4.4.0-18.el9_8.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libtiff-debugsource-0:4.4.0-18.el9_8.1.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • libtiff-debugsource-0:4.4.0-18.el9_8.1.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libtiff-debugsource-0:4.4.0-18.el9_8.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libtiff-debugsource-0:4.4.0-18.el9_8.1.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • libtiff-debugsource-0:4.4.0-18.el9_8.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libtiff-debugsource-0:4.4.0-18.el9_8.1.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • libtiff-debugsource-0:4.4.0-18.el9_8.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libtiff-debugsource-0:4.4.0-18.el9_8.1.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
  • libtiff-devel-0:4.4.0-18.el9_8.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libtiff-devel-0:4.4.0-18.el9_8.1.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libtiff-devel-0:4.4.0-18.el9_8.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • libtiff-devel-0:4.4.0-18.el9_8.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • +14 more not shown

✅ 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)