CVE-2026-68452
s390/zcrypt: Validate length for CCA AES cipher key requests
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 13, 2026 |
| Last Updated | Aug 19, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd < be037204e4f595e4bd2159acda146677a1dc6342 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd < 4e500ecb6704d879f9c2417c2ed6faba595015ca 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd < 7f9e5a3dbb14a9b321a1dfa30390402c673f82dc 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd < 406b317ea2b501f6f5eca1264293c9399a73a778 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd < 4fc46deceda076d429ef3fab2ccf8d96629ebd23 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd < ad93a1f1a45652478c0cf4eb029114e03af57f3b 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd < 3859f630b674801a00bca39bc451f52288591f65 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd < 06afe425d5283b9764303de47f554da5a808ce8a
Linux / Linux
5.4
References
git.kernel.org: https://git.kernel.org/stable/c/be037204e4f595e4bd2159acda146677a1dc6342 git.kernel.org: https://git.kernel.org/stable/c/4e500ecb6704d879f9c2417c2ed6faba595015ca git.kernel.org: https://git.kernel.org/stable/c/7f9e5a3dbb14a9b321a1dfa30390402c673f82dc git.kernel.org: https://git.kernel.org/stable/c/406b317ea2b501f6f5eca1264293c9399a73a778 git.kernel.org: https://git.kernel.org/stable/c/4fc46deceda076d429ef3fab2ccf8d96629ebd23 git.kernel.org: https://git.kernel.org/stable/c/ad93a1f1a45652478c0cf4eb029114e03af57f3b git.kernel.org: https://git.kernel.org/stable/c/3859f630b674801a00bca39bc451f52288591f65 git.kernel.org: https://git.kernel.org/stable/c/06afe425d5283b9764303de47f554da5a808ce8a