Bug 2373522 (CVE-2022-50213)

Summary: CVE-2022-50213 kernel: netfilter: nf_tables: do not allow SET_ID to refer to another table
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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OS: Linux   
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Description OSIDB Bzimport 2025-06-18 12:06:42 UTC 
In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_tables: do not allow SET_ID to refer to another table

When doing lookups for sets on the same batch by using its ID, a set from a
different table can be used.

Then, when the table is removed, a reference to the set may be kept after
the set is freed, leading to a potential use-after-free.

When looking for sets by ID, use the table that was used for the lookup by
name, and only return sets belonging to that same table.

This fixes CVE-2022-2586, also reported as ZDI-CAN-17470.
Comment 1 Avinash Hanwate 2025-06-19 18:23:48 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025061844-CVE-2022-50213-bc19@gregkh/T