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CVE-2024-40957 is a Linux kernel Segment Routing over IPv6 (SRv6) flaw in the End.DX4 and End.DX6 local processing behaviors. The input_action_end_dx4() and input_action_end_dx6() paths invoke the Netfilter PREROUTING hook with incorrect device arguments, passing a NULL ingress device where a valid ingress device is required and an output device should be NULL. Netfilter extensions that dereference the ingress-device pointer, including reverse-path-filter matching logic, can consequently cause a kernel NULL-pointer dereference.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Incorrect NF_HOOK parameter passing in Linux kernel Segment Routing End.DX4 and End.DX6 behavior.
Linux kernel Segment Routing over IPv6 parameter-passing flaw in End.DX4 and End.DX6 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.