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CVE-2021-3764 is a memory-leak vulnerability in the Linux kernel AMD CCP cryptographic driver. In ccp_run_aes_gcm_cmd(), an error returned by ccp_init_data(&src) can leave previously allocated resources unreleased. Repeatedly triggering this error path consumes kernel memory and can exhaust available resources. The issue is related to prior CCP resource-leak flaws, including CVE-2019-18808 and CVE-2021-3744.
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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.
Linux kernel denial-of-service vulnerability in ccp_run_aes_gcm_cmd().
Linux kernel denial-of-service vulnerability in CCP AES-GCM command handling.
Linux kernel denial-of-service flaw in the AMD CCP AES-GCM command function.
Linux kernel denial-of-service vulnerability in CCP AES-GCM command processing.
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.