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CVE-2024-26804 is a Linux kernel flaw in the IPv4 IP-tunnel transmission infrastructure. Recursive routing between GRE and IPIP tunnel devices can cause their needed_headroom values to increase indefinitely across transmitted packets. Once headroom expansion makes the distance between skb->head and skb->data exceed 64 KiB, the 16-bit skb->network_header offset can wrap. A subsequent network-offset calculation can return a negative value that is passed to __skb_pull as an unsigned argument, moving skb->data outside its allocated buffer and triggering an out-of-bounds access or KASAN-reported use-after-free. The issue was introduced in Linux kernel 2.6.34.
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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.
21 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel IP tunnel flaw causing perpetual packet headroom growth.
Linux kernel IP tunnel flaw that can cause perpetual packet headroom growth.
A perpetual headroom-growth condition in Linux kernel IP tunnel handling.
Linux kernel IP-tunnel perpetual headroom-growth 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.