{"id":"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-\u003eprog 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-\u003eprog under RCU protection to safely fetch\nthe pointer and guarantee its lifetime while reading its fields.","modified":"2026-09-18T03:48:38.029319999Z","published":"2026-09-17T16:09:25.738Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90392.json","cna_assigner":"Linux"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0c991ebc8c69d29b7fc44db17075c5aa5253e2ab"},{"fixed":"a5c936ac904767fc1d943d40b0308bcb2ae2509b"},{"fixed":"d7d7208e2603b45724b684f4df73904fb347741e"},{"fixed":"85cf991c881e7198be32be05a9daa2625390c8b3"},{"fixed":"79347e42cfbc9e78872922e8f08a70609c9af82f"},{"fixed":"863f3ddd0b8ac65abfb50d3be0869268ac0e277b"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90392.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.7.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.52"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90392.json"}}],"schema_version":"1.9.0"}