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CVE-2026-31692 is an authorization flaw in the Linux kernel rtnetlink subsystem. The rtnl_newlink() path did not verify CAP_NET_ADMIN in the peer network namespace when creating paired network devices, including veth, vxcan, and netkit devices. An unprivileged user operating in a user namespace could therefore create interfaces in arbitrary peer network namespaces, including the initial network namespace. The fix requires netlink_ns_capable() authorization for CAP_NET_ADMIN in the peer namespace before device creation proceeds.
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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.
19 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel rtnetlink flaw involving a missing netlink_ns_capable() capability check for a peer network namespace. It affects packages installed on the Rocky Linux 8 host covered by CIQ advisory crlsa-2026_49213.
A Linux kernel rtnetlink authorization-check flaw caused by a missing netlink_ns_capable() check for a peer network namespace, affecting Rocky Linux 10.2 kernel packages.
A Linux kernel rtnetlink flaw involving a missing netlink namespace capability check for a peer network namespace.
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.