CVE-2026-74283High· 7.8▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: tipc: require net admin for TIPCv2 netlink mutators TIPCv2 registers mutating generic-netlink operations without admin permission flags. Generic netlink only checks CA…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
In the Linux kernel, the following vulnerability has been resolved:
tipc: require net admin for TIPCv2 netlink mutators
TIPCv2 registers mutating generic-netlink operations without admin permission flags. Generic netlink only checks CAP_NET_ADMIN when an operation sets GENL_ADMIN_PERM or GENL_UNS_ADMIN_PERM, so a local unprivileged process can currently change TIPC state through commands such as TIPC_NL_NET_SET, TIPC_NL_KEY_SET, TIPC_NL_KEY_FLUSH, and bearer enable/disable.
The legacy TIPC netlink API already checks netlink_net_capable(..., CAP_NET_ADMIN) for administrative commands. Give the TIPCv2 mutators the equivalent generic-netlink gate. Use GENL_UNS_ADMIN_PERM, which maps to the same namespace-aware CAP_NET_ADMIN check that netlink_net_capable() performs, so the behaviour matches the legacy path and keeps working for CAP_NET_ADMIN holders in a non-initial user namespace (containers).
A QEMU/KASAN repro run as uid/gid 65534 with zero effective capabilities previously succeeded in changing the network id and node identity, setting and flushing key material, and enabling/disabling a UDP bearer. With this patch applied the same operations fail with -EPERM.
Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < b06fb5f78a9af0929aaa47c92d0b7bca0617fb25Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < 52864c6c13dcc292481eabfeb3c31a86c3ec06f2Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < e87dcc1a644d087de0bb6c94c6dd28c29b89597fLinux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < 9b937de4b3ded62a24da6e8d9d623cdb2748fa74Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < c9668a4adb2264625daeeabc7466b783badd4614Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < cebaefe1aceb650d5c99a4c0e1a4dde09e211818Linux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < 56f0a2e0a1d004e025cd031c3a801ab73959269fLinux >= 0655f6a8635b1b66f2434d5556b1044c14b1ccaf < 86b0c540e2ea397cde021eecd24145f7c16a3d4eLinux 3.19Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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