Answer in brief
CVE-2026-74283 records a High severity (CVSS 7.8) vulnerability in tipc: require net admin for TIPCv2 netlink mutators. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <b06fb5f78a9af0929aaa47c92d0b7bca0617fb25 || >=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <52864c6c13dcc292481eabfeb3c31a86c3ec06f2 || >=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <e87dcc1a644d087de0bb6c94c6dd28c29b89597f || >=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <9b937de4b3ded62a24da6e8d9d623cdb2748fa74 || >=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <c9668a4adb2264625daeeabc7466b783badd4614 || >=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <cebaefe1aceb650d5c99a4c0e1a4dde09e211818 || >=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <56f0a2e0a1d004e025cd031c3a801ab73959269f || >=0655f6a8635b1b66f2434d5556b1044c14b1ccaf <86b0c540e2ea397cde021eecd24145f7c16a3d4e | b06fb5f78a9af0929aaa47c92d0b7bca0617fb25, 52864c6c13dcc292481eabfeb3c31a86c3ec06f2, e87dcc1a644d087de0bb6c94c6dd28c29b89597f, 9b937de4b3ded62a24da6e8d9d623cdb2748fa74, c9668a4adb2264625daeeabc7466b783badd4614, cebaefe1aceb650d5c99a4c0e1a4dde09e211818, 56f0a2e0a1d004e025cd031c3a801ab73959269f, 86b0c540e2ea397cde021eecd24145f7c16a3d4e |
| Linux/Linuxgeneric | 3.19 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
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.
Quoted source text, attributed separately from HOL analysis.