High 7.8Published Aug 13, 2026

CVE-2026-68452s390/zcrypt: Validate length for CCA AES cipher key requests

Updated under an hour ago (Oct 27, 2026, 12:50 PM ET)

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Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-120
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before be037204e4f595e4bd2159acda146677a1dc6342; from 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before 4e500ecb6704d879f9c2417c2ed6faba595015ca; from 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before 7f9e5a3dbb14a9b321a1dfa30390402c673f82dc; from 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before 406b317ea2b501f6f5eca1264293c9399a73a778; from 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before 4fc46deceda076d429ef3fab2ccf8d96629ebd23; from 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before ad93a1f1a45652478c0cf4eb029114e03af57f3b; from 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before 3859f630b674801a00bca39bc451f52288591f65; from 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd before 06afe425d5283b9764303de47f554da5a808ce8a	CNA record

References

References

https://git.kernel.org/stable/c/be037204e4f595e4bd2159acda146677a1dc6342
https://git.kernel.org/stable/c/4e500ecb6704d879f9c2417c2ed6faba595015ca
https://git.kernel.org/stable/c/7f9e5a3dbb14a9b321a1dfa30390402c673f82dc
https://git.kernel.org/stable/c/406b317ea2b501f6f5eca1264293c9399a73a778
https://git.kernel.org/stable/c/4fc46deceda076d429ef3fab2ccf8d96629ebd23
https://git.kernel.org/stable/c/ad93a1f1a45652478c0cf4eb029114e03af57f3b
https://git.kernel.org/stable/c/3859f630b674801a00bca39bc451f52288591f65
https://git.kernel.org/stable/c/06afe425d5283b9764303de47f554da5a808ce8a

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.