{"id":"CVE-2026-68294","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-68294","summary":"net: qrtr: restrict socket creation to the initial network namespace","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qrtr: restrict socket creation to the initial network namespace\n\nQRTR keeps its entire port and node state in module-global variables\nthat are not partitioned per network namespace: qrtr_local_nid is a\nsingle global node id (always 1) and qrtr_ports is a single global\nxarray. qrtr_port_lookup() and qrtr_local_enqueue() operate on that\nglobal state with no network-namespace check, and qrtr_create() places\nno restriction on the namespace a socket is created in.\n\nAs a result an unprivileged process that creates an AF_QIPCRTR socket\nin a separate network namespace, e.g. via\nunshare(CLONE_NEWUSER | CLONE_NEWNET), can send QRTR datagrams -\nincluding control-plane messages such as QRTR_TYPE_NEW_SERVER - to QRTR\nsockets owned by another namespace, and vice versa. The receiving\nsocket sees such a message as coming from node id 1, indistinguishable\nfrom a legitimate local client, breaking the isolation that network\nnamespaces are expected to provide.\n\nQRTR is a transport to global hardware endpoints (the modem and other\nremote processors) and has no per-namespace semantics; its in-kernel\nname service already creates its socket in init_net only. Confine the\nsocket family to the initial network namespace, as other\nnon-namespace-aware socket families do (see llc_ui_create() and the\nieee802154 socket code).","published":"2026-08-10T12:02:27.423Z","modified":"2026-08-14T04:03:56.423011729Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.6.148"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3b536db8fb32da9e9c62f2bb45e2e319331f0426"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4b95e1f0d6e6342c427cb341ee18a894b146b789"},{"type":"WEB","url":"https://git.kernel.org/stable/c/659b9b4f194bb56b9903cc95e786ef1d438baa7d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8150c48fb978e01689f94ed80148f8a7499ae571"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f488116df769bdaf89c93371350e49e12133e70f"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68294.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68294"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-14T04:03:56.423011729Z"}}