Bug 2414482 (CVE-2025-40168) - CVE-2025-40168 kernel: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match()
Summary: CVE-2025-40168 kernel: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_p...
Keywords:
Status: NEW
Alias: CVE-2025-40168
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: 2025-11-12 11:02 UTC by OSIDB Bzimport
Modified: 2026-04-08 03:32 UTC (History)
0 users

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-2026:2720 0 None None None 2026-02-16 11:50:23 UTC
Red Hat Product Errata RHSA-2026:2821 0 None None None 2026-02-17 12:46:26 UTC
Red Hat Product Errata RHSA-2026:3275 0 None None None 2026-02-25 01:49:55 UTC
Red Hat Product Errata RHSA-2026:3488 0 None None None 2026-03-02 02:59:26 UTC
Red Hat Product Errata RHSA-2026:4111 0 None None None 2026-03-09 16:42:12 UTC
Red Hat Product Errata RHSA-2026:6954 0 None None None 2026-04-08 03:32:13 UTC

Description OSIDB Bzimport 2025-11-12 11:02:38 UTC 
In the Linux kernel, the following vulnerability has been resolved:

smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match().

smc_clc_prfx_match() is called from smc_listen_work() and
not under RCU nor RTNL.

Using sk_dst_get(sk)->dev could trigger UAF.

Let's use __sk_dst_get() and dst_dev_rcu().

Note that the returned value of smc_clc_prfx_match() is not
used in the caller.
Comment 1 Alexander B 2025-11-13 15:48:15 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025111256-CVE-2025-40168-bdd5@gregkh/T
Comment 3 errata-xmlrpc 2026-02-16 11:50:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:2720 https://access.redhat.com/errata/RHSA-2026:2720
Comment 4 errata-xmlrpc 2026-02-17 12:46:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:2821 https://access.redhat.com/errata/RHSA-2026:2821
Comment 5 errata-xmlrpc 2026-02-25 01:49:54 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:3275 https://access.redhat.com/errata/RHSA-2026:3275
Comment 6 errata-xmlrpc 2026-03-02 02:59:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:3488 https://access.redhat.com/errata/RHSA-2026:3488
Comment 7 errata-xmlrpc 2026-03-09 16:42:11 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:4111 https://access.redhat.com/errata/RHSA-2026:4111
Comment 8 errata-xmlrpc 2026-04-08 03:32:13 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:6954 https://access.redhat.com/errata/RHSA-2026:6954
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