Bug 2502248 (CVE-2026-63824) - CVE-2026-63824 kernel: KEYS: fix overflow in keyctl_pkey_params_get_2()
Summary: CVE-2026-63824 kernel: KEYS: fix overflow in keyctl_pkey_params_get_2()
Keywords:
Status: NEW
Alias: CVE-2026-63824
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-19 13:03 UTC by OSIDB Bzimport
Modified: 2026-09-24 21:38 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:63128 0 None None None 2026-09-04 01:03:03 UTC
Red Hat Product Errata RHSA-2026:63129 0 None None None 2026-09-04 00:52:58 UTC

Description OSIDB Bzimport 2026-07-19 13:03:56 UTC 
In the Linux kernel, the following vulnerability has been resolved:

KEYS: fix overflow in keyctl_pkey_params_get_2()

The length for the internal output buffer is calculated incorrectly, which
can result overflow when a too small buffer is provided.

Fix the bug by allocating internal output with the size of the maximum
length of the cryptographic primitive instead of caller provided size.
Comment 1 Keith Grant 2026-07-20 16:02:56 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026071906-CVE-2026-63824-6a2f@gregkh/T
Comment 3 errata-xmlrpc 2026-09-04 00:52:57 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:63129 https://access.redhat.com/errata/RHSA-2026:63129
Comment 4 errata-xmlrpc 2026-09-04 01:03:02 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:63128 https://access.redhat.com/errata/RHSA-2026:63128
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