Bug 2373580 (CVE-2022-50048)

Summary: CVE-2022-50048 kernel: netfilter: nf_tables: possible module reference underflow in error path
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: low    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-06-18 12:09:14 UTC 
In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_tables: possible module reference underflow in error path

dst->ops is set on when nft_expr_clone() fails, but module refcount has
not been bumped yet, therefore nft_expr_destroy() leads to module
reference underflow.
Comment 1 Avinash Hanwate 2025-06-19 09:23:08 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025061845-CVE-2022-50048-40d7@gregkh/T