{"id":"CVE-2026-90146","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-90146","summary":"bpf, xdp: move offload check into dev_xdp_install()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, xdp: move offload check into dev_xdp_install()\n\nbpf_xdp_link_update() calls dev_xdp_install() directly and skips\ndev_xdp_attach(), so the checks in dev_xdp_attach() do not run. A user can\nmake an XDP link with a normal program and then swap in an offloaded or\ndevice-bound program with BPF_LINK_UPDATE, which puts it on the software\npath.\n\ndev_xdp_install() is the one place all three paths go through:\n\"ip link set xdp\" and BPF_LINK_CREATE reach it via dev_xdp_attach(), and\nBPF_LINK_UPDATE calls it directly. So move the program checks (offloaded,\nbound to another device, device-bound in generic mode, native vs generic,\nDEVMAP and CPUMAP) there, and keep only the netlink-flag check\n(XDP_FLAGS_UPDATE_IF_NOEXIST) in dev_xdp_attach().","published":"2026-09-17T16:06:41.695Z","modified":"2026-09-19T03:47:30.973026766Z","cvss":{"score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.18.52"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/03022dd874070768a7099f18b1944c633641315f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ad27ed7d2309419a129078d781504f486b1b469a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ea7b35dcc9430293b861bc7bad0c546f193c85f9"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90146.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90146"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-19T03:47:30.973026766Z"}}