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.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
References 5
https://git.kernel.org/stable/c/06afe425d5283b9764303de47f554da5a808ce8a
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/3859f630b674801a00bca39bc451f52288591f65
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/406b317ea2b501f6f5eca1264293c9399a73a778
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/4fc46deceda076d429ef3fab2ccf8d96629ebd23
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/ad93a1f1a45652478c0cf4eb029114e03af57f3b
416baaa9-dc9f-4396-8d5f-8c081fb06d67