Bug 2396143 (CVE-2023-53340)

Summary: CVE-2023-53340 kernel: net/mlx5: Collect command failures data only for known commands
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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An out-of-bounds write vulnerability exists in the linux kernel, such that when DEVX issues a general command not used by the mlx5 driver, the mlx5 is trying to collect the failure data, However, mlx5 doesn't create a storage for this command, leading to an array-index-out-of-bounds error.
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Description OSIDB Bzimport 2025-09-17 15:03:52 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net/mlx5: Collect command failures data only for known commands

DEVX can issue a general command, which is not used by mlx5 driver.
In case such command is failed, mlx5 is trying to collect the failure
data, However, mlx5 doesn't create a storage for this command, since
mlx5 doesn't use it. This lead to array-index-out-of-bounds error.

Fix it by checking whether the command is known before collecting the
failure data.
Comment 1 Jon Moroney 2025-09-17 18:39:11 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091718-CVE-2023-53340-c694@gregkh/T