CVE-2024-3861: Debian Linux

Medium severity, CVSS 4.0. EPSS: 0.2% chance of exploitation in the next 30 days.

If an AlignedBuffer were assigned to itself, the subsequent self-move could result in an incorrect reference count and later use-after-free. 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 115.0 (fixed in 115.0); before 125.0 (fixed in 125.0)
• Mozilla Thunderbird: before 115.0 (fixed in 115.0)

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