CVE-2026-26740

Publication date 18 March 2026

Last updated 6 August 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

8.2 · High

Score breakdown

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.

Status

Package Ubuntu Release Status
giflib 26.04 LTS resolute
Fixed 5.2.2-1ubuntu3.2
25.10 questing Ignored end of life, was needed
24.04 LTS noble
Fixed 5.2.2-1ubuntu1.2
22.04 LTS jammy
Fixed 5.1.9-2ubuntu0.3
20.04 LTS focal
Vulnerable
18.04 LTS bionic
Vulnerable
16.04 LTS xenial
Vulnerable

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
giflib

Severity score breakdown

CVSS version: CVSS v3.0

Base score 8.2 · High

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

References

Related Ubuntu Security Notices (USN)

Other references

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