CVE-2024-2608: Debian Linux

High severity, CVSS 8.4. EPSS: 0.4% chance of exploitation in the next 30 days.

`AppendEncodedAttributeValue(), ExtraSpaceNeededForAttrEncoding()` and `AppendEncodedCharacters()` could have experienced integer overflows, causing underallocation of an output buffer leading to an out of bounds write. This vulnerability affects Firefox < 124, Firefox ESR < 115.9, and Thunderbird < 115.9.

Affected products

• Debian Debian Linux: version 10.0 only
• Mozilla Firefox: before 115.9.0 (fixed in 115.9.0); before 124.0 (fixed in 124.0)
• Mozilla Thunderbird: before 115.9.0 (fixed in 115.9.0)

Published 2024-03-19. Last modified 2026-06-17.