Bug 2348575 (CVE-2025-21764) - CVE-2025-21764 kernel: ndisc: use RCU protection in ndisc_alloc_skb()
Summary: CVE-2025-21764 kernel: ndisc: use RCU protection in ndisc_alloc_skb()
Keywords:
Status: NEW
Alias: CVE-2025-21764
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: 2025-02-27 03:03 UTC by OSIDB Bzimport
Modified: 2025-06-16 07:44 UTC (History)
4 users (show)

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

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2025:8333 0 None None None 2025-06-02 01:16:10 UTC
Red Hat Product Errata RHSA-2025:9079 0 None None None 2025-06-16 07:44:07 UTC

Description OSIDB Bzimport 2025-02-27 03:03:47 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ndisc: use RCU protection in ndisc_alloc_skb()

ndisc_alloc_skb() can be called without RTNL or RCU being held.

Add RCU protection to avoid possible UAF.
Comment 1 Michal Findra 2025-02-27 17:38:38 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022605-CVE-2025-21764-1061@gregkh/T
Comment 2 errata-xmlrpc 2025-06-02 01:16:08 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:8333 https://access.redhat.com/errata/RHSA-2025:8333
Comment 4 errata-xmlrpc 2025-06-16 07:44:06 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2025:9079 https://access.redhat.com/errata/RHSA-2025:9079
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