Bug 2404094 (CVE-2025-39978)

Summary: CVE-2025-39978 kernel: octeontx2-pf: Fix potential use after free in otx2_tc_add_flow()
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 2025-10-15 08:01:33 UTC 
In the Linux kernel, the following vulnerability has been resolved:

octeontx2-pf: Fix potential use after free in otx2_tc_add_flow()

This code calls kfree_rcu(new_node, rcu) and then dereferences "new_node"
and then dereferences it on the next line.  Two lines later, we take
a mutex so I don't think this is an RCU safe region.  Re-order it to do
the dereferences before queuing up the free.
Comment 1 Alexander B 2025-10-16 12:10:39 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025101558-CVE-2025-39978-d538@gregkh/T