A buffer overflow vulnerability (CVE-2026-26740, CVSS 8.2 HIGH) in the EGifGCBToExtension function of giflib allows for a Denial of Service attack. The NVD lists giflib version 5.2.2 as affected, though the article does not specify a fixed version number. Red Hat has released patched packages, rated Important, for multiple RHEL 9.2 Update Services for SAP Solutions architectures.
Red Hat Product Errata RHSA-2026:33509 - Security Advisory Issued: 2026-06-30 Updated: 2026-06-30 RHSA-2026:33509 - 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 9.2 Update Services for SAP Solutions. 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 Server - AUS 9.2 x86_64 Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.2 ppc64le Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.2 x86_64 Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.2 aarch64 Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.2 s390x Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.2 x86_64 Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 9.2 aarch64 Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.2 ppc64le Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 9.2 s390x 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 Server - AUS 9.2 SRPM giflib-5.2.1-9.el9_2.2.src.rpm SHA-256: cf1e3cab92f304e6a173c04dd2d6708969df0fdac7ffe06273e44f13b61acef4 x86_64 giflib-5.2.1-9.el9_2.2.i686.rpm SHA-256: 63be853117e8dabf80d2a412a5216dd5648f24d77b017bc1a8e9a58d8829e73a giflib-5.2.1-9.el9_2.2.x86_64.rpm SHA-256: 4b091f1a3f6bbb3eb793a13f67c533f07368e8d0af0364c34216410034597027 giflib-debuginfo-5.2.1-9.el9_2.2.i686.rpm SHA-256: fb0433bfb78c372fa9614924f2fcccfe8133222761ddd1d226980b8dbcc947d6 giflib-debuginfo-5.2.1-9.el9_2.2.x86_64.rpm SHA-256: 3fbc7be5debfe8d4c18ab934e6354c84e1e1928cd3c5dafdad01c9889a873155 giflib-debugsource-5.2.1-9.el9_2.2.i686.rpm SHA-256: 7c2456ad57e62190e5d597f910dd1dd83d48e20fb14cefea8473f89da5e6d6c4 giflib-debugsource-5.2.1-9.el9_2.2.x86_64.rpm SHA-256: 19e59a3c7df278df5077d5b8b25d81018129eda1d5be657a7c985d9c3066857c giflib-utils-debuginfo-5.2.1-9.el9_2.2.i686.rpm SHA-256: 139280a01ba258991bc44847b64d4d6ec6c790e7062d7041bc3d083e7fbfffb9 giflib-utils-debuginfo-5.2.1-9.el9_2.2.x86_64.rpm SHA-256: 98720eb8599dd4090e67d6326720377e9a0c438d21e9ea9aaafd689bbb0c6aa8 Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.2 SRPM giflib-5.2.1-9.el9_2.2.src.rpm SHA-256: cf1e3cab92f304e6a173c04dd2d6708969df0fdac7ffe06273e44f13b61acef4 ppc64le giflib-5.2.1-9.el9_2.2.ppc64le.rpm SHA-256: 5b59a2ad85e46da615e7de87d00bb90afd29299a4e88ccc57c87fe49ce50793c giflib-debuginfo-5.2.1-9.el9_2.2.ppc64le.rpm SHA-256: 8e2ca14a701f3ec8895ef8ac6c226d13c5dee270b87143d8ef75af4a4f3275f2 giflib-debugsource-5.2.1-9.el9_2.2.ppc64le.rpm SHA-256: 63ae9f00febaefab28812752012eff7036ce84b39edd76860ee51b633ce06cbd giflib-utils-debuginfo-5.2.1-9.el9_2.2.ppc64le.rpm SHA-256: ff3bb37b89e105d5c27fccf2c2cf6b4bf3dded6b3d1bcc15ffa15065a588e015 Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.2 SRPM giflib-5.2.1-9.el9_2.2.src.rpm SHA-256: cf1e3cab92f304e6a173c04dd2d6708969df0fdac7ffe06273e44f13b61acef4 x86_64 giflib-5.2.1-9.el9_2.2.i686.rpm SHA-256: 63be853117e8dabf80d2a412a5216dd5648f24d77b017bc1a8e9a58d8829e73a giflib-5.2.1-9.el9_2.2.x86_64.rpm SHA-256: 4b091f1a3f6bbb3eb793a13f67c533f07368e8d0af0364c34216410034597027 giflib-debuginfo-5.2.1-9.el9_2.2.i686.rpm SHA-256: fb0433bfb78c372fa9614924f2fcccfe8133222761ddd1d226980b8dbcc947d6 giflib-debuginfo-5.2.1-9.el9_2.2.x86_64.rpm SHA-256: 3fbc7be5debfe8d4c18ab934e6354c84e1e1928cd3c5dafdad01c9889a873155 giflib-debugsource-5.2.1-9.el9_2.2.i686.rpm SHA-256: 7c2456ad57e62190e5d597f910dd1dd83d48e20fb14cefea8473f89da5e6d6c4 giflib-debugsource-5.2.1-9.el9_2.2.x86_64.rpm SHA-256: 19e59a3c7df278df5077d5b8b25d81018129eda1d5be657a7c985d9c3066857c giflib-utils-debuginfo-5.2.1-9.el9_2.2.i686.rpm SHA-256: 139280a01ba258991bc44847b64d4d6ec6c790e7062d7041bc3d083e7fbfffb9 giflib-utils-debuginfo-5.2.1-9.el9_2.2.x86_64.rpm SHA-256: 98720eb8599dd4090e67d6326720377e9a0c438d21e9ea9aaafd689bbb0c6aa8 Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.2 SRPM giflib-5.2.1-9.el9_2.2.src.rpm SHA-256: cf1e3cab92f304e6a173c04dd2d6708969df0fdac7ffe06273e44f13b61acef4 aarch64 giflib-5.2.1-9.el9_2.2.aarch64.rpm SHA-256: c3184b7fbb9b00b2585074a0f55c0a4d4fe79bf8ee00d9df9fbe6c0629d772d5 giflib-debuginfo-5.2.1-9.el9_2.2.aarch64.rpm SHA-256: b4384b1c55a023ee42ea724b1d95db50796b6ef3fcfe36312cf7db6f27905f51 giflib-debugsource-5.2.1-9.el9_2.2.aarch64.rpm SHA-256: 7fa9134006d79e391a2ba632419ad2ae9e2833f345ff7dcd693a89787c92c27a giflib-utils-debuginfo-5.2.1-9.el9_2.2.aarch64.rpm SHA-256: 211ca98e78f6fcc69ab5e2abf3073698aca662aaf8533b07deae7bbe107f5e24 Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.2 SRPM giflib-5.2.1-9.el9_2.2.src.rpm SHA-256: cf1e3cab92f304e6a173c04dd2d6708969df0fdac7ffe06273e44f13b61acef4 s390x giflib-5.2.1-9.el9_2.2.s390x.rpm SHA-256: ba7249b525e655ad7f533512cce0d4d4d984f4cd774987190ff775e2aa7a9c30 giflib-debuginfo-5.2.1-9.el9_2.2.s390x.rpm SHA-256: 7386a5986944b4423a13861031b095a6fc58efa305a01a1634868cb065830129 giflib-debugsource-5.2.1-9.el9_2.2.s390x.rpm SHA-256: 0b54b80da8d1f661d7aa1a85b50f1ada53836e0930630e25a7d40d613ed90f01 giflib-utils-debuginfo-5.2.1-9.el9_2.2.s390x.rpm SHA-256: 07a82512a04d1e4638a32963b3cac66cf375af7e1868d061c12945e9e0108ae2 Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.2 SRPM giflib-5.2.1-9.el9_2.2.src.rpm SHA-256: cf1e3cab92f304e6a173c04dd2d6708969df0fdac7ffe06273e44f13b61acef4 x86_64 giflib-5.2.1-9.el9_2.2.i686.rpm SHA-256: 63be853117e8dabf80d2a412a5216dd5648f24d77b017bc1a8e9a58d8829e73a giflib-5.2.1-9.el9_2.2.x86_64.rpm SHA-256: 4b091f1a3f6bbb3eb793a13f67c533f07368e8d0af0364c34216410034597027 giflib-debuginfo-5.2.1-9.el9_2.2.i686.rpm SHA-256: fb0433bfb78c372fa9614924f2fcccfe8133222761ddd1d226980b8dbcc947d6 giflib-debuginfo-5.2.1-9.el9_2.2.x86_64.rpm SHA-256: 3fbc7be5debfe8d4c18ab934e6354c84e1e1928cd3c5dafdad01c9889a873155 giflib-debugsource-5.2.1-9.el9_2.2.i686.rpm SHA-256: 7c2456ad57e62190e5d597f910dd1dd83d48e20fb14cefea8473f89da5e6d6c4 giflib-debugsource-5.2.1-9.el9_2.2.x86_64.rpm SHA-256: 19e59a3c7df278df5077d5b8b25d81018129eda1d5be657a7c985d9c3066857c giflib-utils-debuginfo-5.2.1-9.el9_2.2.i686.rpm SHA-256: 139280a01ba258991bc44847b64d4d6ec6c790e7062d7041bc3d083e7fbfffb9 giflib-utils-debuginfo-5.2.1-9.el9_2.2.x86_64.rpm SHA-256: 98720eb8599dd4090e67d6326720377e9a0c438d21e9ea9aaafd689bbb0c6aa8 Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 9.2 SRPM giflib-5.2.1-9.el9_2.2.src.rpm SHA-256: cf1e3cab92f304e6a173c04dd2d6708969df0fdac7ffe06273e44f13b61acef4 aarch64 giflib-5.2.1-9.el9_2.2.aarch64.rpm SHA-256: c3184b7fbb9b00b2585074a0f55c0a4d4fe79bf8ee00d9df9fbe6c0629d772d5 giflib-debuginfo-5.2.1-9.el9_2.2.aarch64.rpm SHA-256: b4384b1c55a023ee42ea724b1d95db50796b6ef3fcfe36312cf7db6f27905f51 giflib-debugsource-5.2.1-9.el9_2.2.aarch64.rpm SHA-256: 7fa9134006d79e391a2ba632419ad2ae9e2833f345ff7dcd693a89787c92c27a giflib-utils-debuginfo-5.2.1-9.el9_2.2.aarch64.rpm SHA-256: 211ca98e78f6fcc69ab5e2abf3073698aca662aaf8533b07deae7bbe107f5e24 Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.2 SRPM giflib-5.2.1-9.el9_2.2.src.rpm SHA-256: cf1e3cab92f304e6a173c04dd2d6708969df0fdac7ffe06273e44f13b61acef4 ppc64le giflib-5.2.1-9.el9_2.2.ppc64le.rpm SHA-256: 5b59a2ad85e46da615e7de87d00bb90afd29299a4e88ccc57c87fe49ce50793c giflib-debuginfo-5.2.1-9.el9_2.2.ppc64le.rpm SHA-256: 8e2ca14a701f3ec8895ef8ac6c226d13c5dee270b87143d8ef75af4a4f3275f2 giflib-debugsource-5.2.1-9.el9_2.2.ppc64le.rpm SHA-256: 63ae9f00febaefab28812752012eff7036ce84b39edd76860ee51b633ce06cbd giflib-utils-debuginfo-5.2.1-9.el9_2.2.ppc64le.rpm SHA-256: ff3bb37b89e105d5c27fccf2c2cf6b4bf3dded6b3d1bcc15ffa15065a588e015 Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 9.2 SRPM giflib-5.2.1-9.el9_2.2.src.rpm SHA-256: cf1e3cab92f304e6a173c04dd2d6708969df0fdac7ffe06273e44f13b61acef4 s390x giflib-5.2.1-9.el9_2.2.s390x.rpm SHA-256: ba7249b525e655ad7f533512cce0d4d4d984f4cd774987190ff775e2aa7a9c30 giflib-debuginfo-5.2.1-9.el9_2.2.s390x.rpm SHA-256: 7386a5986944b4423a13861031b095a6fc58efa305a01a1634868cb065830129 giflib-debugsource-5.2.1-9.el9_2.2.s390x.rpm SHA-256: 0b54b80da8d1f661d7aa1a85b50f1ada53836e0930630e25a7d40d613ed90f01 giflib-utils-debuginfo-5.2.1-9.el9_2.2.s390x.rpm SHA-256: 07a82512a04d1e4638a32963b3cac66cf375af7e1868d061c12945e9e0108ae2 The Red Hat security contact is secalert@redhat.com . 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