Red Hat Security Advisory: libtiff security, bug fix, and enhancement update

Fixed packages 6

Vulnerabilities 2

• High 7.5
  CVE-2023-52355

  Libtiff: tiffrasterscanlinesize64 produce too-big size and could cause oom

  An out-of-memory flaw was found in libtiff that could be triggered by passing a crafted tiff file to the TIFFRasterScanlineSize64() API. This flaw allows a remote attacker to cause a denial of service via a crafted input with a size smaller than 379 KB.

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 7 Linux Debian Ubuntu
  Jan 25, 2024
• High 7.3
  CVE-2026-12912

  Libtiff: libtiff: heap-based buffer overflow via crafted pixarlog-compressed tiff image

  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 specif…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 6 Linux Debian Ubuntu Azure Linux
  Jun 29, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2251326
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2492871
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_49671.json
• report
  https://access.redhat.com/security/cve/CVE-2023-52355
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-52355
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-52355
• article
  https://gitlab.com/libtiff/libtiff/-/issues/621
• report
  https://access.redhat.com/security/cve/CVE-2026-12912
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-12912
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-12912
• article
  https://gitlab.com/libtiff/libtiff/-/merge_requests/873
• article
  https://gitlab.com/libtiff/libtiff/-/work_items/824