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CVE-2026-68452

HIGHCVSS 7.8/10EPSS 0.13%

Last modified

CVE-2026-68452 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.13% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.13%

2.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd, < be037204e4f595e4bd2159acda146677a1dc6342; >= 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd, < 4e500ecb6704d879f9c2417c2ed6faba595015ca; >= 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd, < 7f9e5a3dbb14a9b321a1dfa30390402c673f82dc; >= 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd, < 406b317ea2b501f6f5eca1264293c9399a73a778; >= 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd, < 4fc46deceda076d429ef3fab2ccf8d96629ebd23; >= 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd, < ad93a1f1a45652478c0cf4eb029114e03af57f3b; >= 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd, < 3859f630b674801a00bca39bc451f52288591f65; >= 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd, < 06afe425d5283b9764303de47f554da5a808ce8a
LinuxLinux5.4

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-68452?
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.
How severe is CVE-2026-68452?
CVE-2026-68452 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.13% probability of exploitation in the next 30 days.
How do I fix CVE-2026-68452?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST