CVE-2025-66442
5.1
MEDIUM
CVSS 3.1
EPSS 0.02%
Description
In Mbed TLS through 4.0.0, there is a compiler-induced timing side channel (in RSA and CBC/ECB decryption) that only occurs with LLVM's select-optimize feature. TF-PSA-Crypto through 1.0.0 is also affected.
How to fix CVE-2025-66442
No fixed version has been published yet. Mitigate by removing the affected package or applying upstream guidance from the references below.
- Debian/mbedtls—no fix listed
Is CVE-2025-66442 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.1 | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |