CVE-2024-11705: Mozilla Firefox

Critical severity, CVSS 9.1. EPSS: 0.7% chance of exploitation in the next 30 days.

`NSC_DeriveKey` inadvertently assumed that the `phKey` parameter is always non-NULL. When it was passed as NULL, a segmentation fault (SEGV) occurred, leading to crashes. This behavior conflicted with the PKCS#11 v3.0 specification, which allows `phKey` to be NULL for certain mechanisms. This vulnerability affects Firefox < 133 and Thunderbird < 133.

Affected products

• Mozilla Firefox: before 133.0 (fixed in 133.0)
• Mozilla Thunderbird: before 133.0 (fixed in 133.0)

Published 2024-11-26. Last modified 2026-06-17.