CVE-2026-80709
Published Aug 28, 2026
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.
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EPSS — Exploit Prediction
0.0016
Probability of exploitation
0.06%
Percentile rank
EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.
References
Other References
https://git.kernel.org/stable/c/1223477ca88e2396eca440919d0ca8754df79bd5
https://git.kernel.org/stable/c/13e53d6ae1c3b2ff1be75b9ef09be26f4ec3ce15
https://git.kernel.org/stable/c/4589f742718d0256ea6dd1f5a78be6e689bdb8aa
https://git.kernel.org/stable/c/672b12940e3f1336dfed5287412a71500adf2a76
https://git.kernel.org/stable/c/983279d7f86ade73db86f886e09172dd567031b5
https://git.kernel.org/stable/c/b505dcc8307d64468b463dfad45a03bf865c637e
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 do I check if I'm vulnerable to CVE-2026-80709? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.