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 the slave device's header operations directly into the bond device. Later, when packet header construction invokes those callbacks through the bond device, tunnel-specific header functions operate on the bond device instead of the original tunnel device. Because those callbacks use netdev_priv() and expect a device-private structure matching the tunnel implementation, they instead receive the bonding driver's private structure, resulting in incompatible type interpretation and corrupted state. The immediate consequence is invalid memory access and kernel crashes during header handling, and the issue has also been reported as exploitable for local privilege escalation through controlled memory corruption in skb-related structures. The vulnerability affects Linux kernel versions reported as 2.6.24 through 6.12.77 and was fixed by introducing bonding-specific wrapper header operations that dispatch to the active slave using the slave's own device context rather than blindly inheriting the slave's header_ops.
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.
28 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.