High 7.8Published Aug 13, 2026

CVE-2026-68451s390/zcrypt: Validate length for CCA ECC private key requests

Updated under an hour ago (Oct 27, 2026, 9:50 AM 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 ECC private key requests cca_ecc2protkey() 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 fa6999e326fe7851ecbd572b8cb9be8e930ebf41 before 7dc306ff7c4d951582adaae65e0aee9fb4968dbe; from fa6999e326fe7851ecbd572b8cb9be8e930ebf41 before 447a37a6bef11bfd3645069e380460b11386e2b9; from fa6999e326fe7851ecbd572b8cb9be8e930ebf41 before f0831f13c42c1261d449dcee8a035e1c6cd9fcaa; from fa6999e326fe7851ecbd572b8cb9be8e930ebf41 before dd25bd9b0f36849808bd7625dcc59dd4c1aeef3e; from fa6999e326fe7851ecbd572b8cb9be8e930ebf41 before ecc3b8691c1935f9f3e4eb964ab11e40fdec17f5; from fa6999e326fe7851ecbd572b8cb9be8e930ebf41 before 013a4484f061a2b41f052e25c0015203287e63f1; from fa6999e326fe7851ecbd572b8cb9be8e930ebf41 before 8fa3e9435a13c335efb63fb4f4e77531a0031159; from fa6999e326fe7851ecbd572b8cb9be8e930ebf41 before a9ae0f6dd45c3ccc1d69363f7aea8af179122730	CNA record

References

References

https://git.kernel.org/stable/c/7dc306ff7c4d951582adaae65e0aee9fb4968dbe
https://git.kernel.org/stable/c/447a37a6bef11bfd3645069e380460b11386e2b9
https://git.kernel.org/stable/c/f0831f13c42c1261d449dcee8a035e1c6cd9fcaa
https://git.kernel.org/stable/c/dd25bd9b0f36849808bd7625dcc59dd4c1aeef3e
https://git.kernel.org/stable/c/ecc3b8691c1935f9f3e4eb964ab11e40fdec17f5
https://git.kernel.org/stable/c/013a4484f061a2b41f052e25c0015203287e63f1
https://git.kernel.org/stable/c/8fa3e9435a13c335efb63fb4f4e77531a0031159
https://git.kernel.org/stable/c/a9ae0f6dd45c3ccc1d69363f7aea8af179122730

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.