{"id":"CVE-2026-90392","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-90392","summary":"bpf: Fix potential UAF when reading bpf link info","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix potential UAF when reading bpf link info\n\nIn bpf_link_show_fdinfo and bpf_link_get_info_by_fd, link->prog is\naccessed without holding any locks. If the prog is concurrently replaced\nvia bpf_link_update, the old prog can be freed, leading to a potential\nUAF issue.\n\nFix this by accessing link->prog under RCU protection to safely fetch\nthe pointer and guarantee its lifetime while reading its fields.","published":"2026-09-17T16:09:25.738Z","modified":"2026-09-19T03:47:29.130733201Z","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":"6.6.157"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/79347e42cfbc9e78872922e8f08a70609c9af82f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/85cf991c881e7198be32be05a9daa2625390c8b3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/863f3ddd0b8ac65abfb50d3be0869268ac0e277b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a5c936ac904767fc1d943d40b0308bcb2ae2509b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d7d7208e2603b45724b684f4df73904fb347741e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90392.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90392"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-19T03:47:29.130733201Z"}}