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CVE-2021-47257 is a NULL pointer dereference in the Linux kernel IEEE 802.15.4 networking subsystem. A logic error in device-address parsing permits an invalid mode to be specified for a supplied address type, resulting in dereference of a NULL pointer.
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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.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A low-severity Linux kernel networking vulnerability in the IEEE 802.15.4 subsystem, caused by a null-pointer dereference while parsing a device address. It has been resolved in upstream kernel versions and Red Hat Enterprise Linux 8 updates.
A Linux kernel IEEE 802.15.4 networking vulnerability caused by a logic error in device-address parsing. A local low-privileged user can trigger a NULL-pointer dereference and cause a denial of service (system crash) by setting an invalid mode for the address type.
A Linux kernel IEEE 802.15.4 networking flaw in net/ieee802154/nl802154.c. An incorrectly selected mode for an address type could trigger a null-pointer dereference.
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.