Bug 2414506 (CVE-2025-40170) - CVE-2025-40170 kernel: net: use dst_dev_rcu() in sk_setup_caps()
Summary: CVE-2025-40170 kernel: net: use dst_dev_rcu() in sk_setup_caps()
Keywords:
Status: NEW
Alias: CVE-2025-40170
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 11:04 UTC by OSIDB Bzimport
Modified: 2026-02-10 02:00 UTC (History)
0 users

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-2026:1690 0 None None None 2026-02-02 09:50:36 UTC
Red Hat Product Errata RHSA-2026:2212 0 None None None 2026-02-09 02:13:18 UTC
Red Hat Product Errata RHSA-2026:2264 0 None None None 2026-02-09 04:38:20 UTC
Red Hat Product Errata RHSA-2026:2378 0 None None None 2026-02-10 02:00:15 UTC

Description OSIDB Bzimport 2025-11-12 11:04:17 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: use dst_dev_rcu() in sk_setup_caps()

Use RCU to protect accesses to dst->dev from sk_setup_caps()
and sk_dst_gso_max_size().

Also use dst_dev_rcu() in ip6_dst_mtu_maybe_forward(),
and ip_dst_mtu_maybe_forward().

ip4_dst_hoplimit() can use dst_dev_net_rcu().
Comment 1 Alexander B 2025-11-13 13:53:43 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025111259-CVE-2025-40170-d39d@gregkh/T
Comment 3 errata-xmlrpc 2026-02-02 09:50:35 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:1690 https://access.redhat.com/errata/RHSA-2026:1690
Comment 5 errata-xmlrpc 2026-02-09 02:13:17 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:2212 https://access.redhat.com/errata/RHSA-2026:2212
Comment 6 errata-xmlrpc 2026-02-09 04:38:19 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:2264 https://access.redhat.com/errata/RHSA-2026:2264
Comment 7 errata-xmlrpc 2026-02-10 02:00:14 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:2378 https://access.redhat.com/errata/RHSA-2026:2378
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