Bug 2356617 (CVE-2025-21975)

Summary: CVE-2025-21975 kernel: net/mlx5: handle errors in mlx5_chains_create_table()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, mcascell, vkumar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-04-01 16:02:44 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net/mlx5: handle errors in mlx5_chains_create_table()

In mlx5_chains_create_table(), the return value of mlx5_get_fdb_sub_ns()
and mlx5_get_flow_namespace() must be checked to prevent NULL pointer
dereferences. If either function fails, the function should log error
message with mlx5_core_warn() and return error pointer.
Comment 2 Mauro Matteo Cascella 2025-05-22 10:03:04 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025040147-CVE-2025-21975-6693@gregkh/T