CVE-2023-5388: Debian Linux

Medium severity, CVSS 6.5. EPSS: 0.8% chance of exploitation in the next 30 days.

NSS was susceptible to a timing side-channel attack when performing RSA decryption. This attack could potentially allow an attacker to recover the private data. 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.