Loading vulnerability…
CVE-2026-43456 is a Linux kernel vulnerability in the net/bonding subsystem caused by type confusion in bond_setup_by_slave(). When a non-Ethernet slave device such as a GRE or IP6GRE tunnel is enslaved to a bond, the bonding code copies slave_dev->header_ops directly into bond_dev->header_ops. Later, when dev_hard_header() invokes those callbacks on the bond device, GRE-specific handlers such as ipgre_header() or ip6gre_header() execute with the bond net_device instead of the original tunnel device. Those handlers use netdev_priv(dev) and therefore interpret the bond device’s private data (struct bonding) as tunnel-specific private data such as struct ip_tunnel, resulting in invalid field accesses, garbage values, and memory corruption. The reported crash manifests in pskb_expand_head() via malformed skb handling, and the issue was fixed by introducing bonding-specific wrapper header_ops that delegate to the active slave while preserving the slave device context expected by the underlying callbacks.
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.
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.
19 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel privilege escalation vulnerability in the net/bonding subsystem caused by type confusion when a bond device copies header_ops from a slave device, enabling reliable local privilege escalation/root via crafted GRE/IP6GRE interface chaining.
Unknown
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.