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.
Affected products
giflib_project: giflib
References10
- github.com/zakkanijia/POC/blob/main/giflib/giftool/giflib_gifto… ExploitThird Party Advisory
- access.redhat.com/errata/RHSA-2026:33447
- access.redhat.com/errata/RHSA-2026:33450
- access.redhat.com/errata/RHSA-2026:33451
- access.redhat.com/errata/RHSA-2026:33452
- access.redhat.com/errata/RHSA-2026:33455
- access.redhat.com/errata/RHSA-2026:33456
- access.redhat.com/errata/RHSA-2026:33501
- access.redhat.com/errata/RHSA-2026:33502
- access.redhat.com/errata/RHSA-2026:33503
Metrics
- CVSS 3.1
-
8.2
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H - EPSS — exploit probability
- 1% percentile: 52 · as of 12 November 2026
- CWE
- CWE-787
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