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CVE-2022-20368 is an out-of-bounds read vulnerability in the Linux kernel AF_PACKET receive path. When an AF_PACKET socket uses PACKET_COPY_THRESH together with memory-mapped packet-ring operations, tpacket_rcv() can queue socket buffers whose skb control buffer contains uninitialized or stale data. packet_recvmsg() subsequently uses that data in a copy-length calculation, resulting in an oversized copy and slab out-of-bounds access.
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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.
9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel net/packet flaw causing slab out-of-bounds access in packet_recvmsg().
Linux kernel packet socket slab out-of-bounds access in packet_recvmsg().
Linux kernel packet-socket slab out-of-bounds access vulnerability.
Linux kernel packet socket slab out-of-bounds access 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.