Bug 2508480 (CVE-2026-64558) - CVE-2026-64558 kernel: s390/pkey: Check length in pkey_pckmo handler implementation
Summary: CVE-2026-64558 kernel: s390/pkey: Check length in pkey_pckmo handler implemen...
Keywords:
Status: NEW
Alias: CVE-2026-64558
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-29 17:01 UTC by OSIDB Bzimport
Modified: 2026-10-01 09:02 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:74174 0 None None None 2026-10-01 09:02:04 UTC

Description OSIDB Bzimport 2026-07-29 17:01:32 UTC 
In the Linux kernel, the following vulnerability has been resolved:

s390/pkey: Check length in pkey_pckmo handler implementation

Explicitly check the length of the target buffer in the pkey_pckmo
implementation of the key_to_protkey() handler function. The handler
function fails, if the generated output data exceeds the length of the
provided target buffer.
Comment 1 TEJ RATHI 2026-07-30 02:59:59 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026072912-CVE-2026-64558-7352@gregkh/T
Comment 7 Jon Orris 2026-10-01 09:02:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:74174 https://access.redhat.com/errata/RHSA-2026:74174
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