CVE-2021-47560 (GCVE-0-2021-47560)

Vulnerability from cvelistv5 – Published: 2024-05-24 15:12 – Updated: 2025-05-04 07:13
VLAI?
Title
mlxsw: spectrum: Protect driver from buggy firmware
Summary
In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum: Protect driver from buggy firmware When processing port up/down events generated by the device's firmware, the driver protects itself from events reported for non-existent local ports, but not the CPU port (local port 0), which exists, but lacks a netdev. This can result in a NULL pointer dereference when calling netif_carrier_{on,off}(). Fix this by bailing early when processing an event reported for the CPU port. Problem was only observed when running on top of a buggy emulator.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 28b1987ef5064dd5c43538ba1168ef7b801f3cad , < 90d0736876c50ecde1a3275636a06b9ddb1cace9 (git)
Affected: 28b1987ef5064dd5c43538ba1168ef7b801f3cad , < da4d70199e5d82da664a80077508d6c18f5e76df (git)
Affected: 28b1987ef5064dd5c43538ba1168ef7b801f3cad , < 63b08b1f6834bbb0b4f7783bf63b80c8c8e9a047 (git)
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    Linux Linux Affected: 5.4
Unaffected: 0 , < 5.4 (semver)
Unaffected: 5.10.83 , ≤ 5.10.* (semver)
Unaffected: 5.15.6 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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