Bug 2348655 (CVE-2025-21762) - CVE-2025-21762 kernel: arp: use RCU protection in arp_xmit()
Summary: CVE-2025-21762 kernel: arp: use RCU protection in arp_xmit()
Keywords:
Status: NEW
Alias: CVE-2025-21762
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 03:06 UTC by OSIDB Bzimport
Modified: 2025-02-27 17:37 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2025-02-27 03:06:38 UTC 
In the Linux kernel, the following vulnerability has been resolved:

arp: use RCU protection in arp_xmit()

arp_xmit() can be called without RTNL or RCU protection.

Use RCU protection to avoid potential UAF.
Comment 1 Mauro Matteo Cascella 2025-02-27 17:29:19 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022604-CVE-2025-21762-8b8d@gregkh/T
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