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CVE-2026-80709

HIGHCVSS 7.8/10EPSS 0.16%

Last modified

CVE-2026-80709 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: 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.. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

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.

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
0.16%

5.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

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

VendorProductVersions
LinuxLinux>= cfd68b33094e1a92249850ff3c3c92ae9112a541, < 4589f742718d0256ea6dd1f5a78be6e689bdb8aa; >= cfd68b33094e1a92249850ff3c3c92ae9112a541, < b505dcc8307d64468b463dfad45a03bf865c637e; >= cfd68b33094e1a92249850ff3c3c92ae9112a541, < 13e53d6ae1c3b2ff1be75b9ef09be26f4ec3ce15; >= cfd68b33094e1a92249850ff3c3c92ae9112a541, < 672b12940e3f1336dfed5287412a71500adf2a76; >= cfd68b33094e1a92249850ff3c3c92ae9112a541, < 1223477ca88e2396eca440919d0ca8754df79bd5; >= cfd68b33094e1a92249850ff3c3c92ae9112a541, < 983279d7f86ade73db86f886e09172dd567031b5
LinuxLinux5.18

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-80709?
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.
How severe is CVE-2026-80709?
CVE-2026-80709 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.
How do I fix CVE-2026-80709?
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