{"id":"CVE-2026-90392","title":"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","summary":"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…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab < a5c936ac904767fc1d943d40b0308bcb2ae2509b","Linux >= 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab < d7d7208e2603b45724b684f4df73904fb347741e","Linux >= 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab < 85cf991c881e7198be32be05a9daa2625390c8b3","Linux >= 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab < 79347e42cfbc9e78872922e8f08a70609c9af82f","Linux >= 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab < 863f3ddd0b8ac65abfb50d3be0869268ac0e277b","Linux 5.7"],"published":"2026-09-17","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:17:56.940","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90392","references":[{"url":"https://git.kernel.org/stable/c/79347e42cfbc9e78872922e8f08a70609c9af82f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/85cf991c881e7198be32be05a9daa2625390c8b3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/863f3ddd0b8ac65abfb50d3be0869268ac0e277b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a5c936ac904767fc1d943d40b0308bcb2ae2509b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d7d7208e2603b45724b684f4df73904fb347741e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00163,"epssPercentile":0.05976,"ingestedAt":"2026-09-17T16:21:47.803Z","slug":"CVE-2026-90392","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":207295,"id":"CVE-2026-90392","ts":1789757340527,"field":"cvss","old":null,"new":"7.8"},{"seq":207294,"id":"CVE-2026-90392","ts":1789757340527,"field":"severity","old":"none","new":"high"}]}