vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2026-68452

s390/zcrypt: Validate length for CCA AES cipher 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

Using Linux by Linux?

Get instant alerts when new vulnerabilities affect Linux - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
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 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.

Affected

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

Linux Kernel· Linux
90%
4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd5.4
Vendor states this is fixed in 06afe425d5283b9764303de47f554da5a808ce8a (fixed)
Vendor states this is fixed in 3859f630b674801a00bca39bc451f52288591f65 (fixed)
Vendor states this is fixed in 406b317ea2b501f6f5eca1264293c9399a73a778 (fixed)
Vendor states this is fixed in 4e500ecb6704d879f9c2417c2ed6faba595015ca (fixed)
Vendor states this is fixed in 4fc46deceda076d429ef3fab2ccf8d96629ebd23 (fixed)
Vendor states this is fixed in 7f9e5a3dbb14a9b321a1dfa30390402c673f82dc (fixed)
Vendor states this is fixed in ad93a1f1a45652478c0cf4eb029114e03af57f3b (fixed)
Vendor states this is fixed in be037204e4f595e4bd2159acda146677a1dc6342 (fixed)
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 5.4 (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/406b317ea2b501f6f5eca1264293c9399a73a778
Source: cverecord
https://git.kernel.org/stable/c/4fc46deceda076d429ef3fab2ccf8d96629ebd23
Source: cverecord
https://git.kernel.org/stable/c/ad93a1f1a45652478c0cf4eb029114e03af57f3b
Source: cverecord
https://git.kernel.org/stable/c/3859f630b674801a00bca39bc451f52288591f65
Source: cverecord
https://git.kernel.org/stable/c/06afe425d5283b9764303de47f554da5a808ce8a
Source: cverecord
https://git.kernel.org/stable/c/be037204e4f595e4bd2159acda146677a1dc6342
Source: cverecord
https://git.kernel.org/stable/c/4e500ecb6704d879f9c2417c2ed6faba595015ca
Source: cverecord
https://git.kernel.org/stable/c/7f9e5a3dbb14a9b321a1dfa30390402c673f82dc

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

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card