Posted by Michel Lind on Mar 12 severity: high (CVSS 3.1: 8.1) Affected versions: <= 2.13.0 Description: An out of bounds write exists in FreeType versions 2.13.0 and below when attempting to parse font subglyph structures related to TrueType GX and variable font files. The vulnerable code assigns a signed short value to an unsigned long and then adds a static value causing it to wrap around and allocate too small of a heap buffer. The code then writes up to 6 signed long...

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Subglyph: toward a topology of engineered fracture and false closure in the age of recursive unseeing

USN-7352-1 fixed a vulnerability in FreeType. This update provides the corresponding updates for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. This update also fixes an additional vulnerability in Ubuntu 14.04 LTS. Original advisory details: It was discovered that FreeType incorrectly handled certain memory operations when parsing font subglyph structures. A remote attacker could use this issue to cause FreeType to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2025-27363) Additional advisory details: It was discovered that FreeType incorrectly handled certain memory operations during typical execution. An attacker could possibly use this issue to cause FreeType to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2022-27406)

It was discovered that FreeType incorrectly handled certain memory operations when parsing font subglyph structures. A remote attacker could use this issue to cause FreeType to crash, resulting in a denial of service, or possibly execute arbitrary code.

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An out of bounds write exists in FreeType versions 2.13.0 and below when attempting to parse font subglyph structures related to TrueType GX and variable font files. The vulnerable code assigns a signed short value to an unsigned long and then adds a static value causing it to wrap around …