Bug 2422738 (CVE-2025-68188)

Summary: CVE-2025-68188 kernel: tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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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