Loading vulnerability…
CVE-2024-26804 is an integer-wraparound-driven memory-safety flaw in the Linux kernel IPv4 IP-tunnel infrastructure. Recursive routing between tunnel devices, such as GRE traffic routed through IPIP whose encapsulated traffic is routed back to GRE, causes each transmission to increase the participating devices’ needed_headroom values. The unbounded growth eventually causes skb headroom expansion to place the distance between skb->head and skb->data beyond the range representable by the 16-bit skb network-header offset. The offset wraps, causing skb_network_offset() to return a negative value. A subsequent unsigned __skb_pull() adjustment can move skb->data outside its allocated head area, leading to invalid memory access observed as a KASAN use-after-free. The fix caps needed_headroom updates to prevent perpetual growth.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
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.
4 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.
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.