Loading vulnerability…
CVE-2021-47236 is a memory leak in the Linux kernel CDC EEM USB networking driver. In the transmit path, eem_tx_fixup() may call skb_copy_expand(). If that allocation fails, the function returns NULL without releasing the original socket buffer. Because usbnet_start_xmit() receives NULL, it does not get an opportunity to free that original buffer. The fix releases the original skb before checking the clone/copy result and returning failure.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
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.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A socket-buffer memory leak in the Linux kernel CDC EEM networking driver.
Linux kernel CDC EEM transmit packet-buffer memory leak.
Linux kernel CDC EEM transmit socket-buffer memory leak.
Linux kernel CDC EEM network-driver socket-buffer leak.
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.