Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Giflib Project | Giflib | 5.2.2 |
Related Weaknesses (CWE)
References
- https://github.com/zakkanijia/POC/blob/main/giflib/giftool/giflib_giftool_gce_leExploitThird Party Advisory
- https://access.redhat.com/errata/RHSA-2026:33447
- https://access.redhat.com/errata/RHSA-2026:33450
- https://access.redhat.com/errata/RHSA-2026:33451
- https://access.redhat.com/errata/RHSA-2026:33452
- https://access.redhat.com/errata/RHSA-2026:33455
- https://access.redhat.com/errata/RHSA-2026:33456
- https://access.redhat.com/errata/RHSA-2026:33501
- https://access.redhat.com/errata/RHSA-2026:33502
- https://access.redhat.com/errata/RHSA-2026:33503
- https://access.redhat.com/errata/RHSA-2026:33509
- https://access.redhat.com/errata/RHSA-2026:36004
- https://access.redhat.com/errata/RHSA-2026:36005
- https://access.redhat.com/errata/RHSA-2026:36006
- https://access.redhat.com/errata/RHSA-2026:9683
FAQ
What is CVE-2026-26740?
CVE-2026-26740 is a vulnerability with a CVSS score of 8.2 (HIGH). 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 validat...
How severe is CVE-2026-26740?
CVE-2026-26740 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-26740?
Check the references section above for vendor advisories and patch information. Affected products include: Giflib Project Giflib.