Description
In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Validate length for CCA AES cipher key requests cca_cipher2protkey() derives the copy length for the CPRB parameter block directly from the length field in the key token. Reject the request early if the token length exceeds the available space in the parameter block.
References8
- git.kernel.org/stable/c/06afe425d5283b9764303de47f554da5a808ce8a
- git.kernel.org/stable/c/3859f630b674801a00bca39bc451f52288591f65
- git.kernel.org/stable/c/406b317ea2b501f6f5eca1264293c9399a73a778
- git.kernel.org/stable/c/4e500ecb6704d879f9c2417c2ed6faba595015ca
- git.kernel.org/stable/c/4fc46deceda076d429ef3fab2ccf8d96629ebd23
- git.kernel.org/stable/c/7f9e5a3dbb14a9b321a1dfa30390402c673f82dc
- git.kernel.org/stable/c/ad93a1f1a45652478c0cf4eb029114e03af57f3b
- git.kernel.org/stable/c/be037204e4f595e4bd2159acda146677a1dc6342
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 3 · as of 12 November 2026
- CWE
- CWE-120
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.