CVE-2026-26740
- State
- Published
- Severity
- 8.2 High
- Published
- Mar 18, 2026
- Updated
- Jul 23, 2026
- Reserved
- Feb 16, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.2 High | 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 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | redhat-SADP |
Weaknesses
- CWE-787 Out-of-bounds Write
Affected Products
| Product | Versions |
|---|---|
n/an/a |
|
References
- https://github.com/zakkanijia/POC/blob/main/giflib/giftool/giflib_giftool_gce_len_heap_oobwrite_disclosure.md
- https://access.redhat.com/security/cve/CVE-2026-26740vdb-entry
- RHBZ#2448747issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-26740.json
- https://access.redhat.com/errata/RHSA-2026:33447vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:9689vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:9693vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:33502vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:33503vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:9683vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:9686vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:33450vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:33455vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:33456vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:33509vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:33452vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:33451vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:33501vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:36004vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:36005vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:36006vendor-advisory
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