Ubuntu Security Notice USN-6824-1

Ubuntu Security Notice USN-6824-1
June 10, 2024

giflib vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 23.10
– Ubuntu 22.04 LTS
– Ubuntu 20.04 LTS
– Ubuntu 18.04 LTS
– Ubuntu 16.04 LTS


Several security issues were fixed in giflib.

Software Description:
– giflib: library for GIF images (utilities)


It was discovered that GIFLIB incorrectly handled certain GIF files.
An attacker could possibly use this issue to cause a denial of service.
(CVE-2021-40633, CVE-2022-28506, CVE-2023-39742)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 23.10
giflib-tools 5.2.1-2.5ubuntu0.1

Ubuntu 22.04 LTS
giflib-tools 5.1.9-2ubuntu0.1

Ubuntu 20.04 LTS
giflib-tools 5.1.9-1ubuntu0.1

Ubuntu 18.04 LTS
giflib-tools 5.1.4-2ubuntu0.1+esm1
Available with Ubuntu Pro

Ubuntu 16.04 LTS
giflib-tools 5.1.4-0.3~16.04.1+esm1
Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

CVE-2021-40633, CVE-2022-28506, CVE-2023-39742

Package Information:

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