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CVE-2022-4744 is a double-free vulnerability in the Linux kernel TUN/TAP driver. When TUN device registration fails because a NETDEV_REGISTER notifier rejects the new device, the error-handling path can invoke tun_free_netdev() in a manner that frees the same resource twice. The failure can be triggered by attempting to register a device using a name reserved by IPv4 network-device sysctl handling.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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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.
16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel TUN device double-free vulnerability in tun_free_netdev.
Linux kernel TUN driver double-free vulnerability.
Linux kernel TUN/TAP virtual network-device double-free vulnerability.
Linux kernel TUN/TAP network-device double-free vulnerability.
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.