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CVE-2024-27403 is a double-free flaw in the Linux kernel Netfilter nft_flow_offload flow-setup error path. During flow setup, ownership of the route object's destination (dst) reference is transferred to the flow object. The route object retained its dst pointer; if flow_offload_add() subsequently failed, the error path released the dst reference a second time. The fix clears the route object's dst field after the ownership transfer, preventing the duplicate release and resulting reference-count underflow.
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No public exploit code observed for this vulnerability.
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12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel netfilter nft_flow_offload flaw involving destination state in a route object after flow setup.
Linux kernel netfilter nft_flow_offload vulnerability involving the destination field in a route object after flow setup.
Linux kernel netfilter nft_flow_offload flaw involving failure to reset dst in a route object after flow setup.
A Linux kernel Netfilter nft_flow_offload flaw involving reset of the destination field in a route object after flow setup.
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.