{"id":"CVE-2026-90017","summary":"staging: rtl8723bs: fix OOB read in rtw_action_frame_parse()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix OOB read in rtw_action_frame_parse()\n\nrtw_action_frame_parse() takes a frame_len parameter but never\nactually checks it before indexing into the frame body:\n\n\tconst u8 *frame_body = frame + sizeof(struct ieee80211_hdr_3addr);\n\t...\n\tc = frame_body[0];\n\t...\n\ta = frame_body[1];\n\nframe_body already points 24 bytes (sizeof(struct\nieee80211_hdr_3addr)) into frame, so reading frame_body[0] and\nframe_body[1] requires frame_len \u003e= 26. A management action frame\nshorter than that (e.g. exactly 24 bytes, the minimum a malicious\npeer can send) causes a 1-2 byte out-of-bounds read.\n\nThis is reachable from rtw_cfg80211_monitor_if_xmit_entry() and\ncfg80211_rtw_mgmt_tx() in ioctl_cfg80211.c, both of which pass\nattacker/user-influenced frame buffers and lengths straight through.\n\nAdd the missing length check before frame_body is dereferenced.","modified":"2026-09-18T03:48:35.437741225Z","published":"2026-09-16T10:33:22.827Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90017.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0b7f64c7bb9664777168768c6b44affb07dcbf24"},{"type":"WEB","url":"https://git.kernel.org/stable/c/136f9a3ab87ded8aaf081425cfb2059659dd9023"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1410bce22351ba15d8e58287cbf09d55d7f21fc9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/15081ff835b29e456da29303b32efc436df04695"},{"type":"WEB","url":"https://git.kernel.org/stable/c/310aaa8058d19cc431aedac0f5bb814e84479393"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a54fd1a44862d263df9f8bc17fca3620be31addb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b041e3f35e0d262d42a711094ab594634d72744a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ff917923f4fb9c83717ba135ee47d7e4c1567bb7"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90017.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90017"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"554c0a3abf216c991c5ebddcdb2c08689ecd290b"},{"fixed":"15081ff835b29e456da29303b32efc436df04695"},{"fixed":"310aaa8058d19cc431aedac0f5bb814e84479393"},{"fixed":"1410bce22351ba15d8e58287cbf09d55d7f21fc9"},{"fixed":"0b7f64c7bb9664777168768c6b44affb07dcbf24"},{"fixed":"136f9a3ab87ded8aaf081425cfb2059659dd9023"},{"fixed":"b041e3f35e0d262d42a711094ab594634d72744a"},{"fixed":"a54fd1a44862d263df9f8bc17fca3620be31addb"},{"fixed":"ff917923f4fb9c83717ba135ee47d7e4c1567bb7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90017.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.12.0"},{"fixed":"5.10.270"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.221"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.51"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90017.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"}]}