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CVE-2021-47560 is a NULL pointer dereference in the Linux kernel mlxsw Spectrum driver. While handling firmware-generated port up/down events, the driver checked for non-existent local ports but did not exclude the CPU port (local port 0). The CPU port exists but has no associated network device; consequently, carrier-state handling can call netif_carrier_on() or netif_carrier_off() with a NULL network-device pointer. The upstream fix rejects CPU-port events before netdev operations are performed.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Unknown.
Linux kernel mlxsw Spectrum driver vulnerability related to protection against malformed or buggy firmware behavior.
Linux kernel mlxsw Spectrum driver robustness flaw.
A Linux kernel mlxsw Spectrum driver vulnerability related to protecting the driver from buggy firmware.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.