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CVE-2026-45930 is an information disclosure vulnerability in the Linux kernel's networking stack affecting MCTP netlink response handling. According to the provided description, an RTM_GETNEIGH request can cause the kernel to return uninitialized data in the padding bytes of the returned ndmsg structure because the nlmsg response data was not fully initialized. The fix zero-initializes netlink data in link, address, and neighbor response messages. The issue therefore stems from improper initialization of kernel memory before it is copied back to user space in netlink responses.
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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.
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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.
2 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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.