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CVE-2026-68451

s390/zcrypt: Validate length for CCA ECC private key requests

HIGH
7.8
CVSS Score
Published: August 13, 2026 at 01:59 PM UTC
Updated: October 19, 2026 at 10:17 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
5.10fa6999e326fe7851ecbd572b8cb9be8e930ebf41
Vendor states this is fixed in 013a4484f061a2b41f052e25c0015203287e63f1 (fixed)
Vendor states this is fixed in 447a37a6bef11bfd3645069e380460b11386e2b9 (fixed)
Vendor states this is fixed in 7dc306ff7c4d951582adaae65e0aee9fb4968dbe (fixed)
Vendor states this is fixed in 8fa3e9435a13c335efb63fb4f4e77531a0031159 (fixed)
Vendor states this is fixed in a9ae0f6dd45c3ccc1d69363f7aea8af179122730 (fixed)
Vendor states this is fixed in dd25bd9b0f36849808bd7625dcc59dd4c1aeef3e (fixed)
Vendor states this is fixed in ecc3b8691c1935f9f3e4eb964ab11e40fdec17f5 (fixed)
Vendor states this is fixed in f0831f13c42c1261d449dcee8a035e1c6cd9fcaa (fixed)
Vendor states this is fixed in 5.10 (unaffected)
Vendor states this is fixed in 5.10.265 (unaffected)
Vendor states this is fixed in 5.15.216 (unaffected)
Vendor states this is fixed in 6.1.183 (unaffected)
Vendor states this is fixed in 6.12.103 (unaffected)
Vendor states this is fixed in 6.18.44 (unaffected)
Vendor states this is fixed in 6.6.151 (unaffected)
Vendor states this is fixed in 7.1.8 (unaffected)
Vendor states this is fixed in 7.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (8)

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusRECEIVED
CWE
CWE-120

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