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CVE-2021-30002 is a resource-management flaw in the Linux kernel Video4Linux2 subsystem. In kernels before 5.11.3, the video_usercopy function in the V4L2 ioctl handling path fails to release memory when processing large ioctl arguments in systems with a webcam device. The resulting memory leak is classified as CWE-772, Missing Release of Resource after Effective Lifetime.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
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.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel memory leak involving large arguments in video_usercopy.
Linux kernel V4L2 video_usercopy memory-leak vulnerability.
Linux kernel V4L2 video_usercopy memory leak involving large arguments.
Security vulnerability addressed in this update.
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.