Bug 2422738 (CVE-2025-68188) - CVE-2025-68188 kernel: tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check()
Summary: CVE-2025-68188 kernel: tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_...
Keywords:
Status: NEW
Alias: CVE-2025-68188
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: 2025-12-16 14:07 UTC by OSIDB Bzimport
Modified: 2025-12-16 23:36 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2025-12-16 14:07:42 UTC 
In the Linux kernel, the following vulnerability has been resolved:

tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check()

Use RCU to avoid a pair of atomic operations and a potential
UAF on dst_dev()->flags.
Comment 1 Alexander B 2025-12-16 23:33:57 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025121634-CVE-2025-68188-5392@gregkh/T
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