Red Hat Product Errata RHSA-2026:33450 - Security Advisory Issued: 2026-06-30 Updated: 2026-06-30 RHSA-2026:33450 - Security Advisory Overview Updated Packages Synopsis Important: giflib 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 giflib 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 giflib is a library for reading and writing gif images. Security Fix(es): giflib: giflib: Denial of Service via buffer overflow in EGifGCBToExtension (CVE-2026-26740) 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 - 2448747 - CVE-2026-26740 giflib: giflib: Denial of Service via buffer overflow in EGifGCBToExtension CVEs CVE-2026-26740 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 giflib-5.1.4-3.el8_4.2.src.rpm SHA-256: 6320f4ae26beb9648aaba47868847a5b15faebca28b683dda316da5bb57bbab5 x86_64 giflib-5.1.4-3.el8_4.2.i686.rpm SHA-256: cb35f760d0084b59ec42940a3a648dd4459bb6aac2293b444af4f61c4b4d0b6d giflib-5.1.4-3.el8_4.2.x86_64.rpm SHA-256: e2c655a3a081a223068b5807c7e16f2a362e863cbcd47d6fb2a8b82d242b9d4c giflib-debuginfo-5.1.4-3.el8_4.2.i686.rpm SHA-256: bb78c8392e5ba4e4a8593c9bfba3d59c90417ff7a6281aa060b10402c7bd3b77 giflib-debuginfo-5.1.4-3.el8_4.2.x86_64.rpm SHA-256: c5f0874065bf57b3ea3ea26c90181802e11720f9122953a3c07e61dd6be80249 giflib-debugsource-5.1.4-3.el8_4.2.i686.rpm SHA-256: 897a2db5973a22992b5568daf7c87f56d8f913aa950bf91a81aabd38cc4db6c7 giflib-debugsource-5.1.4-3.el8_4.2.x86_64.rpm SHA-256: e6e16e4baf4e70a98373438244c49a94b409ded5d03d01296988fc4901efa7cf giflib-utils-debuginfo-5.1.4-3.el8_4.2.i686.rpm SHA-256: bac482b1b6b41e4f7abc739538c27ac40c0ec6dd0319aad322be97b0f203ab85 giflib-utils-debuginfo-5.1.4-3.el8_4.2.x86_64.rpm SHA-256: 311d015d763e0acb7148a02722a3d5b598209d5cbb192cfaebbb8ecc7303d472 Red Hat Enterprise Linux Server - AUS 8.4 SRPM giflib-5.1.4-3.el8_4.2.src.rpm SHA-256: 6320f4ae26beb9648aaba47868847a5b15faebca28b683dda316da5bb57bbab5 x86_64 giflib-5.1.4-3.el8_4.2.i686.rpm SHA-256: cb35f760d0084b59ec42940a3a648dd4459bb6aac2293b444af4f61c4b4d0b6d giflib-5.1.4-3.el8_4.2.x86_64.rpm SHA-256: e2c655a3a081a223068b5807c7e16f2a362e863cbcd47d6fb2a8b82d242b9d4c giflib-debuginfo-5.1.4-3.el8_4.2.i686.rpm SHA-256: bb78c8392e5ba4e4a8593c9bfba3d59c90417ff7a6281aa060b10402c7bd3b77 giflib-debuginfo-5.1.4-3.el8_4.2.x86_64.rpm SHA-256: c5f0874065bf57b3ea3ea26c90181802e11720f9122953a3c07e61dd6be80249 giflib-debugsource-5.1.4-3.el8_4.2.i686.rpm SHA-256: 897a2db5973a22992b5568daf7c87f56d8f913aa950bf91a81aabd38cc4db6c7 giflib-debugsource-5.1.4-3.el8_4.2.x86_64.rpm SHA-256: e6e16e4baf4e70a98373438244c49a94b409ded5d03d01296988fc4901efa7cf giflib-utils-debuginfo-5.1.4-3.el8_4.2.i686.rpm SHA-256: bac482b1b6b41e4f7abc739538c27ac40c0ec6dd0319aad322be97b0f203ab85 giflib-utils-debuginfo-5.1.4-3.el8_4.2.x86_64.rpm SHA-256: 311d015d763e0acb7148a02722a3d5b598209d5cbb192cfaebbb8ecc7303d472 The Red Hat security contact is secalert@redhat.com . More contact details at https://access.redhat.com/security/team/contact/ .