CVE-2024-3859: Debian Linux

Medium severity, CVSS 5.9. EPSS: 0.7% chance of exploitation in the next 30 days.

On 32-bit versions there were integer-overflows that led to an out-of-bounds-read that potentially could be triggered by a malformed OpenType font. This vulnerability affects Firefox < 125, Firefox ESR < 115.10, and Thunderbird < 115.10.

Affected products

• Debian Debian Linux: version 10.0 only
• Mozilla Firefox: before 115.10 (fixed in 115.10); before 125.0 (fixed in 125.0)
• Mozilla Thunderbird: before 115.10 (fixed in 115.10)

Published 2024-04-16. Last modified 2026-06-17.