Red Hat Product Errata RHSA-2026:58545 - Security Advisory Issued: 2026-08-24 Updated: 2026-08-24 RHSA-2026:58545 - Security Advisory Overview Updated Packages Synopsis Important: libtiff 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 libtiff is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.6 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 libtiff packages contain a library of functions for manipulating Tagged Image File Format (TIFF) files. Security Fix(es): libtiff: libtiff: Heap-based buffer overflow via crafted PixarLog-compressed TIFF image (CVE-2026-12912) 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 Life Cycle Long Life 8.6 x86_64 Red Hat Enterprise Linux Server - AUS 8.6 x86_64 Fixes BZ - 2492871 - CVE-2026-12912 libtiff: libtiff: Heap-based buffer overflow via crafted PixarLog-compressed TIFF image CVEs CVE-2026-12912 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 Life Cycle Long Life 8.6 SRPM libtiff-4.0.9-21.el8_6.3.src.rpm SHA-256: 0c70c3a51493a90822b1c298b284fa39eaa605bcb973ad858281953c7307281b x86_64 libtiff-4.0.9-21.el8_6.3.i686.rpm SHA-256: 6d9644b5a75cd8ba3c525fe59ea45d76f5ad19795046aa6caa696a538a3f3210 libtiff-4.0.9-21.el8_6.3.x86_64.rpm SHA-256: c8a98a51a61331656f80449304c8aa2e9023754afcdc6c19077d82177c43a903 libtiff-debuginfo-4.0.9-21.el8_6.3.i686.rpm SHA-256: 61939f41edab478aca229c73613e69bc2a401d7844ef8da7a1d1353b86be3264 libtiff-debuginfo-4.0.9-21.el8_6.3.x86_64.rpm SHA-256: c0377a31940d821e6b844f06e255903bf463d94f8e3a90782432f49bffe6bb92 libtiff-debugsource-4.0.9-21.el8_6.3.i686.rpm SHA-256: 46a715c33c05262186dfa66057ff75c8b730fc9c3ef380abc0194827fff6e682 libtiff-debugsource-4.0.9-21.el8_6.3.x86_64.rpm SHA-256: b650fd92ca1ae31ca1db50f956b7e7069c29449c2aa7915b52cb0d995efb5cb5 libtiff-devel-4.0.9-21.el8_6.3.i686.rpm SHA-256: 8fb1769a571f33bdc24bed08e8ca11e4a7406a0c68a376f683d409664c0e7cc3 libtiff-devel-4.0.9-21.el8_6.3.x86_64.rpm SHA-256: 107520b8d52bbf55e59d68eb123e0454cb1e7de972d7e54abf36447320ec4f3e libtiff-tools-debuginfo-4.0.9-21.el8_6.3.i686.rpm SHA-256: b52327dfd33e6c4560ee904edfe106cd7e3f24762e6b5982551a402e82c01374 libtiff-tools-debuginfo-4.0.9-21.el8_6.3.x86_64.rpm SHA-256: 31d5bb8c3467f85ea47b1ae410e422d17b2c74cd9bf3b80fc91aa83e1b7930e6 Red Hat Enterprise Linux Server - AUS 8.6 SRPM libtiff-4.0.9-21.el8_6.3.src.rpm SHA-256: 0c70c3a51493a90822b1c298b284fa39eaa605bcb973ad858281953c7307281b x86_64 libtiff-4.0.9-21.el8_6.3.i686.rpm SHA-256: 6d9644b5a75cd8ba3c525fe59ea45d76f5ad19795046aa6caa696a538a3f3210 libtiff-4.0.9-21.el8_6.3.x86_64.rpm SHA-256: c8a98a51a61331656f80449304c8aa2e9023754afcdc6c19077d82177c43a903 libtiff-debuginfo-4.0.9-21.el8_6.3.i686.rpm SHA-256: 61939f41edab478aca229c73613e69bc2a401d7844ef8da7a1d1353b86be3264 libtiff-debuginfo-4.0.9-21.el8_6.3.x86_64.rpm SHA-256: c0377a31940d821e6b844f06e255903bf463d94f8e3a90782432f49bffe6bb92 libtiff-debugsource-4.0.9-21.el8_6.3.i686.rpm SHA-256: 46a715c33c05262186dfa66057ff75c8b730fc9c3ef380abc0194827fff6e682 libtiff-debugsource-4.0.9-21.el8_6.3.x86_64.rpm SHA-256: b650fd92ca1ae31ca1db50f956b7e7069c29449c2aa7915b52cb0d995efb5cb5 libtiff-devel-4.0.9-21.el8_6.3.i686.rpm SHA-256: 8fb1769a571f33bdc24bed08e8ca11e4a7406a0c68a376f683d409664c0e7cc3 libtiff-devel-4.0.9-21.el8_6.3.x86_64.rpm SHA-256: 107520b8d52bbf55e59d68eb123e0454cb1e7de972d7e54abf36447320ec4f3e libtiff-tools-debuginfo-4.0.9-21.el8_6.3.i686.rpm SHA-256: b52327dfd33e6c4560ee904edfe106cd7e3f24762e6b5982551a402e82c01374 libtiff-tools-debuginfo-4.0.9-21.el8_6.3.x86_64.rpm SHA-256: 31d5bb8c3467f85ea47b1ae410e422d17b2c74cd9bf3b80fc91aa83e1b7930e6 The Red Hat security contact is secalert@redhat.com . More contact details at https://access.redhat.com/security/team/contact/ .