CVE-2025-7383 Timing side-channel vulnerability in AES-CBC decryption with PKCS#7 padding in Oberon PSA Crypto library
Attackers can recover plaintexts from AES-CBC decryption via timing side-channel attacks in the Oberon PSA Crypto library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-7383?
CVE-2025-7383 is a medium-severity vulnerability in Oberon PSA Crypto, published on 29 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Padding oracle attack vulnerability in Oberon microsystem AG’s Oberon PSA Crypto library in all versions since 1.0.0 and prior to 1.5.1 allows an attacker to recover plaintexts via timing measurements of AES-CBC PKCS#7 decrypt operations.
Which versions are affected by CVE-2025-7383?
How do I fix CVE-2025-7383?
No fix has been published for CVE-2025-7383 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-7383 being exploited?
There is no known exploitation of CVE-2025-7383 in the wild and no public exploit code.
Sources
Also known as GHSA-qwf7-j8g6-3hxv.