Red Hat Product Errata RHSA-2026:20583 - Security Advisory Issued: 2026-05-26 Updated: 2026-05-26 RHSA-2026:20583 - Security Advisory Overview Updated Packages Synopsis Important: compat-libtiff3 security update Type/Severity Security Advisory: Important Red Hat Lightspeed patch analysis Identify and remediate systems affected by this advisory. View affected systems Topic An update for compat-libtiff3 is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Description The libtiff3 package provides libtiff 3, an older version of libtiff library for manipulating TIFF (Tagged Image File Format) image format files. This version should be used only if you are unable to use the current version of libtiff. Security Fix(es): libtiff: libtiff: Arbitrary code execution or denial of service via signed integer overflow in TIFF file processing (CVE-2026-4775) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Solution For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Affected Products Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension 8.4 x86_64 Red Hat Enterprise Linux Server - AUS 8.4 x86_64 Fixes BZ - 2450768 - CVE-2026-4775 libtiff: libtiff: Arbitrary code execution or denial of service via signed integer overflow in TIFF file processing CVEs CVE-2026-4775 References https://access.redhat.com/security/updates/classification/#important Note: More recent versions of these packages may be available. Click a package name for more details. Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension 8.4 SRPM compat-libtiff3-3.9.4-13.el8_4.2.src.rpm SHA-256: 73eb042a5e7250679fdfd54e5cdc934032706366dbd18c1410ea3ba2b33b4a88 x86_64 compat-libtiff3-3.9.4-13.el8_4.2.i686.rpm SHA-256: fd04e725413f46d825beeab0077345c65f0998957dda987b1fd3b3e1b3180d28 compat-libtiff3-3.9.4-13.el8_4.2.x86_64.rpm SHA-256: 980f03e3bd2bea0d611614a7d3673e6865931efcf928f4ff8b5a66c99fee89d7 compat-libtiff3-debuginfo-3.9.4-13.el8_4.2.i686.rpm SHA-256: 8633cb6b04dc05f020942d41a1e81c4ac63b6ffbf73b8e671bc19115f30953e2 compat-libtiff3-debuginfo-3.9.4-13.el8_4.2.x86_64.rpm SHA-256: 4197e6cf44f9ce3f8b43205438c29cefb395065ffdaf2935839b161e6f1cd991 compat-libtiff3-debugsource-3.9.4-13.el8_4.2.i686.rpm SHA-256: 85a8395d652ec28bc0041dc42347b0ed3edb54e3942b2f5df7d27a26315173e1 compat-libtiff3-debugsource-3.9.4-13.el8_4.2.x86_64.rpm SHA-256: 5bcb60c9ac08b95d72ec005a3d8280450b0c8df1c319bf3c7ba31ac5b6e7da48 Red Hat Enterprise Linux Server - AUS 8.4 SRPM compat-libtiff3-3.9.4-13.el8_4.2.src.rpm SHA-256: 73eb042a5e7250679fdfd54e5cdc934032706366dbd18c1410ea3ba2b33b4a88 x86_64 compat-libtiff3-3.9.4-13.el8_4.2.i686.rpm SHA-256: fd04e725413f46d825beeab0077345c65f0998957dda987b1fd3b3e1b3180d28 compat-libtiff3-3.9.4-13.el8_4.2.x86_64.rpm SHA-256: 980f03e3bd2bea0d611614a7d3673e6865931efcf928f4ff8b5a66c99fee89d7 compat-libtiff3-debuginfo-3.9.4-13.el8_4.2.i686.rpm SHA-256: 8633cb6b04dc05f020942d41a1e81c4ac63b6ffbf73b8e671bc19115f30953e2 compat-libtiff3-debuginfo-3.9.4-13.el8_4.2.x86_64.rpm SHA-256: 4197e6cf44f9ce3f8b43205438c29cefb395065ffdaf2935839b161e6f1cd991 compat-libtiff3-debugsource-3.9.4-13.el8_4.2.i686.rpm SHA-256: 85a8395d652ec28bc0041dc42347b0ed3edb54e3942b2f5df7d27a26315173e1 compat-libtiff3-debugsource-3.9.4-13.el8_4.2.x86_64.rpm SHA-256: 5bcb60c9ac08b95d72ec005a3d8280450b0c8df1c319bf3c7ba31ac5b6e7da48 The Red Hat security contact is secalert@redhat.com . More contact details at https://access.redhat.com/security/team/contact/ .