Bug 2525466 (CVE-2026-80709) - CVE-2026-80709 kernel: s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs
Summary: CVE-2026-80709 kernel: s390/zcrypt: Fix wrong domain value verification with ...
Keywords:
Status: NEW
Alias: CVE-2026-80709
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-28 07:46 UTC by OSIDB Bzimport
Modified: 2026-09-03 15:51 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-08-28 07:46:25 UTC 
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.
Comment 1 gkamathe 2026-09-01 06:57:24 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026082808-CVE-2026-80709-2ca4@gregkh/T
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