CVE-2026-26740 json
Buffer Overflow vulnerability in giflib v.5.2.2 allows a remote attacker to cause a denial of service via the EGifGCBToExtension overwritin…
published 2026-03-18 7 mo ago modified 2026-07-30 3 mo ago also EUVD-2026-12914 , JLSEC-2026-822
- cvss
- 8.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
Buffer Overflow vulnerability in giflib v.5.2.2 allows a remote attacker to cause a denial of service via the EGifGCBToExtension overwriting an existing Graphic Control Extension block without validating its allocated size.
Patch / fix
- julia Giflib_jll 6.1.3+0
- Red Hat Red Hat Enterprise Linux 10 0:5.2.1-25.el10_2, 1:21.0.11.0.10-2.el10_2, 1:25.0.3.0.9-1.el10_2
- Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:5.2.1-22.el10_0.2, 1:21.0.11.0.10-1.el10_2
- Red Hat Red Hat Enterprise Linux 8 0:5.1.4-5.el8_10, 1:1.8.0.492.b09-1.el8, 1:17.0.19.0.10-1.el8, 1:21.0.11.0.10-1.el8
- Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support 1:1.8.0.492.b09-1.el8
- Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:5.1.4-3.el8_4.2, 1:1.8.0.492.b09-1.el8, 1:17.0.19.0.10-1.el8
- Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:5.1.4-3.el8_4.2, 1:1.8.0.492.b09-1.el8, 1:17.0.19.0.10-1.el8
- Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:5.1.4-3.el8_6.2, 1:1.8.0.492.b09-1.el8, 1:17.0.19.0.10-1.el8
- Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:5.1.4-3.el8_6.2
- Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service 1:1.8.0.492.b09-1.el8, 1:17.0.19.0.10-1.el8
- Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 1:1.8.0.492.b09-1.el8, 1:17.0.19.0.10-1.el8
- Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:5.1.4-3.el8_8.2, 1:1.8.0.492.b09-1.el8, 1:17.0.19.0.10-1.el8
- Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:5.1.4-3.el8_8.2, 1:1.8.0.492.b09-1.el8, 1:17.0.19.0.10-1.el8
- Red Hat Red Hat Enterprise Linux 9 0:5.2.1-10.el9_8.2, 1:1.8.0.492.b09-2.el9, 1:17.0.19.0.10-2.el9, 1:21.0.11.0.10-2.el9, 1:25.0.3.0.9-1.el9
- Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 1:1.8.0.492.b09-1.el9, 1:17.0.19.0.10-1.el9
- Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:5.2.1-9.el9_2.2, 1:1.8.0.492.b09-1.el9, 1:17.0.19.0.10-1.el9
- Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 1:1.8.0.492.b09-1.el9, 1:17.0.19.0.10-1.el9, 1:21.0.11.0.10-1.el9
- Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:5.2.1-9.el9_4.2
- Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:5.2.1-9.el9_6.2, 1:1.8.0.492.b09-1.el9, 1:17.0.19.0.10-1.el9, 1:21.0.11.0.10-1.el9
- Red Hat Red Hat AI Inference Server 3.2 1782951012, 1782951051, 1782951244
- giflib Debian 12 5.2.1-2.5+deb12u1
- giflib Debian 13 5.2.2-1+deb13u1
- giflib Debian 14 6.1.3-1
debian advisories DEBIAN-CVE-2026-26740
- giflib Ubuntu 22.04 LTS 5.1.9-2ubuntu0.3
- giflib Ubuntu 24.04 LTS 5.2.2-1ubuntu1.2
- giflib Ubuntu 26.04 LTS 5.2.2-1ubuntu3.2
ubuntu advisories UBUNTU-CVE-2026-26740
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- giflib RHEL 10.2 5.2.1-25.el10_2
- giflib RHEL 8 5.1.4-5.el8_10
- giflib RHEL 9 5.2.1-10.el9_8.2
- java-21-openjdk RHEL 10.1 1:21.0.11.0.10-2.el10_2
- java-21-openjdk RHEL 8 1:21.0.11.0.10-1.el8
- java-21-openjdk RHEL 9 1:21.0.11.0.10-2.el9
- java-21-openjdk-src RHEL 10.1 1:21.0.11.0.10-2.el10_2
- java-21-openjdk-src RHEL 8 1:21.0.11.0.10-1.el8
red hat advisories RHSA-2026:33509RHSA-2026:33502RHSA-2026:33503RHSA-2026:33501RHSA-2026:33455RHSA-2026:33456
- giflib SLES for SAP applications 16.0, SLES 16.0 5.2.2-160000.4.1
- giflib SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 5.2.2-150000.4.22.1
- giflib SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 5.0.6-13.15.1
suse advisories SUSE-SU-2026:22382-1SUSE-SU-2026:2667-1SUSE-SU-2026:2666-1
- giflib openSUSE Leap 16.0 5.2.2-160000.4.1
- giflib openSUSE Tumbleweed 5.2.2-4.1
opensuse advisories openSUSE-SU-2026:21076-1openSUSE-SU-2026:11117-1
- giflib AlmaLinux 9 5.2.1-10.el9_8.2
- giflib AlmaLinux 10 5.2.1-25.el10_2
- giflib AlmaLinux 8 5.1.4-5.el8_10
- java-1.8.0-openjdk AlmaLinux 8 1:1.8.0.492.b09-1.el8
- java-1.8.0-openjdk AlmaLinux 9 1:1.8.0.492.b09-2.el9.alma.1
- java-1.8.0-openjdk-src AlmaLinux 8 1:1.8.0.492.b09-1.el8
- java-1.8.0-openjdk-src AlmaLinux 9 1:1.8.0.492.b09-2.el9.alma.1
- java-1.8.0-openjdk-demo AlmaLinux 8 1:1.8.0.492.b09-1.el8
almalinux advisories ALSA-2026:33501ALSA-2026:33502ALSA-2026:33503ALSA-2026:9683ALSA-2026:9686ALSA-2026:9689
- giflib Rocky Linux 10 5.2.1-25.el10_2
- giflib Rocky Linux 9 5.2.1-10.el9_8.2
- giflib Rocky Linux 8 5.1.4-5.el8_10
- java-25-openjdk Rocky Linux 10 1:25.0.3.0.9-1.el10_1
rocky linux advisories RLSA-2026:33502RLSA-2026:33501RLSA-2026:33503RLSA-2026:9693
- giflib Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 5.2.2-r2
alpine advisories ALPINE-CVE-2026-26740
Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2026-26740 updated cvss 7.5
giflib: giflib: Denial of Service via buffer overflow in EGifGCBToExtension
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Red Hat Enterprise Linux 6 giflib, giflib-utilsaffected: workaround, no fix planned “Will not fix”
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Red Hat OPENJDK ELS 11.0.31fixed: vendor fix RHSA-2026:9255
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Red Hat AI Inference Server 3.2 rhaiis/vllm-cuda-rhel9 1782951012, rhaiis/vllm-rocm-rhel9 1782951244, rhaiis/model-opt-cuda-rhel9 1782951051fixed: vendor fix RHSA-2026:36004
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Red Hat Build of OpenJDK 8u492fixed: vendor fix RHSA-2026:9684
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Red Hat Build of OpenJDK 17.0.9fixed: vendor fix RHSA-2026:9687
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Red Hat Build of OpenJDK 21.0.11fixed: vendor fix RHSA-2026:9690
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Red Hat Build of OpenJDK 25.0.3fixed: vendor fix RHSA-2026:9694
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Red Hat CodeReady Linux Builder EUS (v.9.4) java-17-openjdk-fastdebug 17.0.19.0.10-1.el9, java-17-openjdk-slowdebug 17.0.19.0.10-1.el9, java-21-openjdk-fastdebug 21.0.11.0.10-1.el9, java-21-openjdk-slowdebug 21.0.11.0.10-1.el9, java-1.8.0-openjdk-fastdebug 1.8.0.492.b09-1.el9, java-1.8.0-openjdk-slowdebug 1.8.0.492.b09-1.el9, +32 more Red Hat CodeReady Linux Builder EUS (v.9.6) java-17-openjdk-fastdebug 17.0.19.0.10-1.el9, java-17-openjdk-slowdebug 17.0.19.0.10-1.el9, java-21-openjdk-fastdebug 21.0.11.0.10-1.el9, java-21-openjdk-slowdebug 21.0.11.0.10-1.el9, java-1.8.0-openjdk-fastdebug 1.8.0.492.b09-1.el9, java-1.8.0-openjdk-slowdebug 1.8.0.492.b09-1.el9, +32 more Red Hat Enterprise Linux AppStream (v. 8) giflib 5.1.4-5.el8_10, java-17-openjdk 17.0.19.0.10-1.el8, java-21-openjdk 21.0.11.0.10-1.el8, java-1.8.0-openjdk 1.8.0.492.b09-1.el8, java-17-openjdk-src 17.0.19.0.10-1.el8, java-21-openjdk-src 21.0.11.0.10-1.el8, +18 more Red Hat Enterprise Linux AppStream (v. 9) giflib 5.2.1-10.el9_8.2, java-25-openjdk 25.0.3.0.9-1.el9, java-17-openjdk 17.0.19.0.10-2.el9, java-21-openjdk 21.0.11.0.10-2.el9, java-25-openjdk-src 25.0.3.0.9-1.el9, java-25-openjdk-demo 25.0.3.0.9-1.el9, +26 more Red Hat Enterprise Linux AppStream (v. 10) giflib 5.2.1-25.el10_2, java-25-openjdk 25.0.3.0.9-1.el10_2, java-21-openjdk 21.0.11.0.10-2.el10_2, java-25-openjdk-src 25.0.3.0.9-1.el10_2, java-25-openjdk-demo 25.0.3.0.9-1.el10_2, java-21-openjdk-src 21.0.11.0.10-2.el10_2, +12 morefixed: vendor fix RHSA-2026:9689
show 12 moreshow fewer
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Red Hat Enterprise Linux AppStream AUS (v. 8.2) java-1.8.0-openjdk 1.8.0.492.b09-1.el8, java-1.8.0-openjdk-src 1.8.0.492.b09-1.el8, java-1.8.0-openjdk-demo 1.8.0.492.b09-1.el8, java-1.8.0-openjdk-javadoc 1.8.0.492.b09-1.el8, java-1.8.0-openjdk-headless 1.8.0.492.b09-1.el8, java-1.8.0-openjdk-javadoc-zip 1.8.0.492.b09-1.el8, +1 more Red Hat Enterprise Linux AppStream AUS (v.8.4) giflib 5.1.4-3.el8_4.2, java-17-openjdk 17.0.19.0.10-1.el8, java-1.8.0-openjdk 1.8.0.492.b09-1.el8, java-17-openjdk-src 17.0.19.0.10-1.el8, java-17-openjdk-demo 17.0.19.0.10-1.el8, java-17-openjdk-jmods 17.0.19.0.10-1.el8, +10 more Red Hat Enterprise Linux AppStream AUS (v.8.6) giflib 5.1.4-3.el8_6.2, java-17-openjdk 17.0.19.0.10-1.el8, java-1.8.0-openjdk 1.8.0.492.b09-1.el8, java-17-openjdk-src 17.0.19.0.10-1.el8, java-17-openjdk-demo 17.0.19.0.10-1.el8, java-17-openjdk-jmods 17.0.19.0.10-1.el8, +10 more Red Hat Enterprise Linux AppStream E4S (v.8.6) java-17-openjdk 17.0.19.0.10-1.el8, java-1.8.0-openjdk 1.8.0.492.b09-1.el8, java-17-openjdk-src 17.0.19.0.10-1.el8, java-17-openjdk-demo 17.0.19.0.10-1.el8, java-17-openjdk-jmods 17.0.19.0.10-1.el8, java-1.8.0-openjdk-src 1.8.0.492.b09-1.el8, +9 more Red Hat Enterprise Linux AppStream E4S (v.8.8) giflib 5.1.4-3.el8_8.2, java-17-openjdk 17.0.19.0.10-1.el8, java-1.8.0-openjdk 1.8.0.492.b09-1.el8, java-17-openjdk-src 17.0.19.0.10-1.el8, java-17-openjdk-demo 17.0.19.0.10-1.el8, java-17-openjdk-jmods 17.0.19.0.10-1.el8, +10 more Red Hat Enterprise Linux AppStream E4S (v.9.0) java-17-openjdk 17.0.19.0.10-1.el9, java-1.8.0-openjdk 1.8.0.492.b09-1.el9, java-17-openjdk-src 17.0.19.0.10-1.el9, java-17-openjdk-demo 17.0.19.0.10-1.el9, java-17-openjdk-jmods 17.0.19.0.10-1.el9, java-1.8.0-openjdk-src 1.8.0.492.b09-1.el9, +8 morefixed: vendor fix RHSA-2026:9683
+1 more productsfewer
Red Hat Enterprise Linux AppStream E4S (v.9.2) giflib 5.2.1-9.el9_2.2, java-17-openjdk 17.0.19.0.10-1.el9, java-1.8.0-openjdk 1.8.0.492.b09-1.el9, java-17-openjdk-src 17.0.19.0.10-1.el9, java-17-openjdk-demo 17.0.19.0.10-1.el9, java-17-openjdk-jmods 17.0.19.0.10-1.el9, +9 more -
Red Hat Enterprise Linux AppStream E4S (v.9.4) giflib 5.2.1-9.el9_4.2fixed: vendor fix RHSA-2026:33452
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Red Hat Enterprise Linux AppStream EUS (v. 10.0) giflib 5.2.1-22.el10_0.2, java-21-openjdk 21.0.11.0.10-1.el10_2, java-21-openjdk-src 21.0.11.0.10-1.el10_2, java-21-openjdk-demo 21.0.11.0.10-1.el10_2, java-21-openjdk-jmods 21.0.11.0.10-1.el10_2, java-21-openjdk-javadoc 21.0.11.0.10-1.el10_2, +3 morefixed: vendor fix RHSA-2026:33447
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Red Hat Enterprise Linux AppStream EUS (v.9.4) java-17-openjdk 17.0.19.0.10-1.el9, java-21-openjdk 21.0.11.0.10-1.el9, java-1.8.0-openjdk 1.8.0.492.b09-1.el9, java-17-openjdk-src 17.0.19.0.10-1.el9, java-21-openjdk-src 21.0.11.0.10-1.el9, java-17-openjdk-demo 17.0.19.0.10-1.el9, +16 more Red Hat Enterprise Linux AppStream EUS (v.9.6) giflib 5.2.1-9.el9_6.2, java-17-openjdk 17.0.19.0.10-1.el9, java-21-openjdk 21.0.11.0.10-1.el9, java-1.8.0-openjdk 1.8.0.492.b09-1.el9, java-17-openjdk-src 17.0.19.0.10-1.el9, java-21-openjdk-src 21.0.11.0.10-1.el9, +17 morefixed: vendor fix RHSA-2026:9689
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Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) giflib 5.1.4-3.el8_4.2, java-17-openjdk 17.0.19.0.10-1.el8, java-1.8.0-openjdk 1.8.0.492.b09-1.el8, java-17-openjdk-src 17.0.19.0.10-1.el8, java-17-openjdk-demo 17.0.19.0.10-1.el8, java-17-openjdk-jmods 17.0.19.0.10-1.el8, +24 morefixed: vendor fix RHSA-2026:9683
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Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) giflib 5.1.4-3.el8_6.2fixed: vendor fix RHSA-2026:33455
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Red Hat Enterprise Linux AppStream TUS (v.8.6) java-17-openjdk 17.0.19.0.10-1.el8, java-1.8.0-openjdk 1.8.0.492.b09-1.el8, java-17-openjdk-src 17.0.19.0.10-1.el8, java-17-openjdk-demo 17.0.19.0.10-1.el8, java-17-openjdk-jmods 17.0.19.0.10-1.el8, java-1.8.0-openjdk-src 1.8.0.492.b09-1.el8, +9 more Red Hat Enterprise Linux AppStream TUS (v.8.8) giflib 5.1.4-3.el8_8.2, java-17-openjdk 17.0.19.0.10-1.el8, java-1.8.0-openjdk 1.8.0.492.b09-1.el8, java-17-openjdk-src 17.0.19.0.10-1.el8, java-17-openjdk-demo 17.0.19.0.10-1.el8, java-17-openjdk-jmods 17.0.19.0.10-1.el8, +10 morefixed: vendor fix RHSA-2026:9683
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Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) java-25-openjdk-fastdebug 25.0.3.0.9-1.el9, java-25-openjdk-slowdebug 25.0.3.0.9-1.el9, java-17-openjdk-fastdebug 17.0.19.0.10-2.el9, java-17-openjdk-slowdebug 17.0.19.0.10-2.el9, java-21-openjdk-fastdebug 21.0.11.0.10-2.el9, java-21-openjdk-slowdebug 21.0.11.0.10-2.el9, +48 more Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) java-25-openjdk-fastdebug 25.0.3.0.9-1.el10_2, java-25-openjdk-slowdebug 25.0.3.0.9-1.el10_2, java-21-openjdk-fastdebug 21.0.11.0.10-2.el10_2, java-21-openjdk-slowdebug 21.0.11.0.10-2.el10_2, java-25-openjdk-src-fastdebug 25.0.3.0.9-1.el10_2, java-25-openjdk-src-slowdebug 25.0.3.0.9-1.el10_2, +24 morefixed: vendor fix RHSA-2026:9689
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Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) java-21-openjdk-fastdebug 21.0.11.0.10-1.el10_2, java-21-openjdk-slowdebug 21.0.11.0.10-1.el10_2, java-21-openjdk-src-fastdebug 21.0.11.0.10-1.el10_2, java-21-openjdk-src-slowdebug 21.0.11.0.10-1.el10_2, java-21-openjdk-demo-fastdebug 21.0.11.0.10-1.el10_2, java-21-openjdk-demo-slowdebug 21.0.11.0.10-1.el10_2, +8 morefixed: vendor fix RHSA-2026:33447
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Red Hat Enterprise Linux CRB (v. 8) java-17-openjdk-fastdebug 17.0.19.0.10-1.el8, java-17-openjdk-slowdebug 17.0.19.0.10-1.el8, java-21-openjdk-fastdebug 21.0.11.0.10-1.el8, java-21-openjdk-slowdebug 21.0.11.0.10-1.el8, java-1.8.0-openjdk-fastdebug 1.8.0.492.b09-1.el8, java-1.8.0-openjdk-slowdebug 1.8.0.492.b09-1.el8, +34 morefixed: vendor fix RHSA-2026:9689
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Red Hat OpenShift AI 3.4 rhai/base-image-neuron-rhel9 1790703542fixed: vendor fix RHSA-2026:74674
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Red Hat build of OpenJDK 11 ELS java-11-openjdk Red Hat Enterprise Linux 7 giflib, giflib-utils, java-1.8.0-openjdk, java-1.8.0-openjdk-src, java-1.8.0-openjdk-demo, java-1.8.0-openjdk-javadoc, +3 morenot affected: vulnerable code not present
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.66% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/zakkanijia/POC/blob/main/giflib/giftool/giflib_giftool_gce_len_heap_oobwrite_disclosure.md referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H |
| CISA ADP | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CNA | 3.1 | 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| OSV | 3.1 | 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| julia | Giflib_jll | >=5.2.2+0, <6.1.3+0 |
6.1.3+0 |
Affected products
- Red Hat Red Hat Enterprise Linux 10
- Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
- Red Hat Red Hat Enterprise Linux 8
- Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support
- Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
- Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
- Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
- Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
- Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service
- Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
- Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
- Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
- Red Hat Red Hat Enterprise Linux 9
- Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
- Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
- Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
- Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
- Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
- Red Hat Red Hat AI Inference Server 3.2
- Red Hat Red Hat build of OpenJDK 11 ELS
- Red Hat Red Hat build of OpenJDK 17
- Red Hat Red Hat build of OpenJDK 1.8
- Red Hat Red Hat build of OpenJDK 21
- Red Hat Red Hat build of OpenJDK 25
- Red Hat Red Hat Enterprise Linux 6
- Red Hat Red Hat Enterprise Linux 7
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
github.com
/zakkanijia/POC/blob/main/giflib/giftool/giflib_giftool_gce_len_heap_oobwrite_disclosure.md
exploit, third-party-advisory, web
-
access.redhat.com
/errata/RHSA-2026:33447
vendor-advisory, web
-
access.redhat.com
/errata/RHSA-2026:9689
vendor-advisory, web
-
access.redhat.com
/errata/RHSA-2026:9693
vendor-advisory, web
-
access.redhat.com
/errata/RHSA-2026:33502
vendor-advisory, web
-
access.redhat.com
/errata/RHSA-2026:33503
vendor-advisory, web
-
access.redhat.com
/errata/RHSA-2026:9683
vendor-advisory, web
-
access.redhat.com
/errata/RHSA-2026:9686
vendor-advisory, web
-
access.redhat.com
/errata/RHSA-2026:33450
vendor-advisory, web
-
access.redhat.com
/errata/RHSA-2026:33455
vendor-advisory, web
-
access.redhat.com
/errata/RHSA-2026:33456
vendor-advisory, web
-
access.redhat.com
/errata/RHSA-2026:33509
vendor-advisory, web
-
access.redhat.com
/errata/RHSA-2026:33452
vendor-advisory, web
-
access.redhat.com
/errata/RHSA-2026:33451
vendor-advisory, web
-
access.redhat.com
/errata/RHSA-2026:33501
vendor-advisory, web
-
access.redhat.com
/errata/RHSA-2026:36004
vendor-advisory, web
-
access.redhat.com
/errata/RHSA-2026:36005
vendor-advisory, web
-
access.redhat.com
/errata/RHSA-2026:36006
vendor-advisory, web
-
access.redhat.com
/security/cve/CVE-2026-26740
vdb-entry, web
-
bugzilla.redhat.com
/show_bug.cgi?id=2448747
issue-tracking, web
-
security.access.redhat.com
/data/csaf/v2/vex/2026/cve-2026-26740.json
web
Sources
- CVE List CVE-2026-26740
- NVD CVE-2026-26740
- OSV JLSEC-2026-822
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.