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CVE-2022-36946 is an improper input-validation flaw in the Linux kernel Netfilter nfnetlink_queue handler, in nfqnl_mangle. Processing an NFQNL_MSG_VERDICT containing a truncated payload can cause packet data to be pulled below the packet-header size. The resulting malformed socket buffer has an invalid length, and the subsequent validation in nfqnl_mangle can trigger a kernel panic. The issue affects Linux kernel versions through 5.18.14 and was fixed upstream in Linux kernel 5.18.16.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository provides a proof-of-concept (PoC) exploit for CVE-2022-36946, a vulnerability in the Linux kernel's netfilter nfnetlink_queue module that allows a local user to trigger a kernel panic (denial of service) by sending a verdict with a 0-byte payload. The exploit is implemented in C and includes three main variants: 'panic6.c' (standard), 'panic6_podman.c' (for use in Podman containers), and 'panic6_rootless.c' (for rootless exploitation using user namespaces). The exploit works by creating a netfilter queue, associating it with TCP port 1337 via iptables, and then sending a crafted verdict to the kernel. The repository also includes a Dockerfile for building the exploit in a container, a shell script ('run.sh') for running the exploit with the correct libraries, and prebuilt shared libraries for different architectures. The README provides detailed instructions, including a remote script for automated exploitation. The exploit targets Linux kernels prior to 5.19 and requires CAP_NET_ADMIN, which can be obtained in a user namespace if the system is configured accordingly. The main attack vector is local, but the exploit can be run in containers or with unprivileged users if user namespaces are enabled.
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7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel denial-of-service flaw in Netfilter nfqnl_mangle().
Linux kernel Netfilter nfnetlink_queue denial-of-service vulnerability in nfqnl_mangle().
Linux kernel Netfilter nfnetlink_queue denial-of-service vulnerability.
Linux kernel Netfilter nfnetlink_queue denial-of-service 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.