vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2026-80709

s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs

HIGH
7.8
CVSS Score
Published: August 28, 2026 at 06:53 AM UTC
Updated: October 16, 2026 at 08:18 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 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs There is a wrong upper limit check for the domain value when an EP11 CPRB is processed for sending to a crypto card. This check is only active on custom device nodes but may lead to access heap memory behind perms->adm when an administrative CPRB is sent. Add correct limit (AP_DOMAINS = 256) checking to fix this.

Affected

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

Linux Kernel· Linux
90%
5.18cfd68b33094e1a92249850ff3c3c92ae9112a541
Vendor states this is fixed in 1223477ca88e2396eca440919d0ca8754df79bd5 (fixed)
Vendor states this is fixed in 13e53d6ae1c3b2ff1be75b9ef09be26f4ec3ce15 (fixed)
Vendor states this is fixed in 4589f742718d0256ea6dd1f5a78be6e689bdb8aa (fixed)
Vendor states this is fixed in 672b12940e3f1336dfed5287412a71500adf2a76 (fixed)
Vendor states this is fixed in 983279d7f86ade73db86f886e09172dd567031b5 (fixed)
Vendor states this is fixed in b505dcc8307d64468b463dfad45a03bf865c637e (fixed)
Vendor states this is fixed in 5.18 (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 (6)

Source: cverecord
https://git.kernel.org/stable/c/4589f742718d0256ea6dd1f5a78be6e689bdb8aa
Source: cverecord
https://git.kernel.org/stable/c/b505dcc8307d64468b463dfad45a03bf865c637e
Source: cverecord
https://git.kernel.org/stable/c/13e53d6ae1c3b2ff1be75b9ef09be26f4ec3ce15
Source: cverecord
https://git.kernel.org/stable/c/672b12940e3f1336dfed5287412a71500adf2a76
Source: cverecord
https://git.kernel.org/stable/c/1223477ca88e2396eca440919d0ca8754df79bd5
Source: cverecord
https://git.kernel.org/stable/c/983279d7f86ade73db86f886e09172dd567031b5

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

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