CVE-2026-26740
High
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.
SeverityHigh
CVSS8.2
Exploit probability—
ProductGiflib
PublishedMar 18, 2026
First seenMar 18, 2026
Weakness typeCWE-787Out-of-bounds write
How to fix
Vendor advisories
- access.redhat.com/errata/RHSA-2026:33447
- access.redhat.com/errata/RHSA-2026:9689
- access.redhat.com/errata/RHSA-2026:9693
- access.redhat.com/errata/RHSA-2026:33502
- access.redhat.com/errata/RHSA-2026:33503
- access.redhat.com/errata/RHSA-2026:9683
- access.redhat.com/errata/RHSA-2026:9686
- access.redhat.com/errata/RHSA-2026:33450
- access.redhat.com/errata/RHSA-2026:33455
- access.redhat.com/errata/RHSA-2026:33456
- access.redhat.com/errata/RHSA-2026:33509
- access.redhat.com/errata/RHSA-2026:33452
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| giflib_project giflib | 5.2.2 | — |
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