{"id":"CVE-2026-64446","summary":"staging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie()\n\nsupplicant_ie is a 256-byte array in struct security_priv. The WPA and\nWPA2 IE copy paths use:\n\n    memcpy(padapter-\u003esecuritypriv.supplicant_ie, &pwpa[0], wpa_ielen + 2);\n\nwhere wpa_ielen is the raw IE length field (u8, 0-255). When a local user\nsupplies a connect request via nl80211 with a crafted WPA IE of length 255,\nwpa_ielen + 2 equals 257, overflowing the 256-byte buffer by one byte into\nthe adjacent last_mic_err_time field.\n\nrtw_parse_wpa_ie() does not prevent this: its length consistency check\ncompares *(wpa_ie+1) against (u8)(wpa_ie_len-2), which is (u8)(255) == 255\nwhen wpa_ie_len = 257, so the check passes silently.\n\nAdd explicit bounds checks for both the WPA and WPA2 paths before the\nmemcpy, rejecting any IE whose total size (wpa_ielen + 2) exceeds the\nsupplicant_ie buffer.","modified":"2026-07-27T04:03:20.060417435Z","published":"2026-07-25T08:51:17.402Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64446.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/138cd190efd56ab36c9fdd8fef8749d06937f24b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2131621986c62c86109ce4d84cf73a73757eb8a6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/46f66c16a95191d9aca07a72ae6b1252a244e26c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5a752a616e756844388a1a45404db9fc29fec655"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5d7812360abf3143afcbf5efe4ef242448fa1f28"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6f20d7b0ee47c470734a69379b0fc6647c519603"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a94a643a80a84ceb8139061c3d6bf988d75e45a5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b9c4bf133c3c47e23baf4f5403b98a953bf58606"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64446.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64446"},{"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":"a94a643a80a84ceb8139061c3d6bf988d75e45a5"},{"fixed":"2131621986c62c86109ce4d84cf73a73757eb8a6"},{"fixed":"6f20d7b0ee47c470734a69379b0fc6647c519603"},{"fixed":"5d7812360abf3143afcbf5efe4ef242448fa1f28"},{"fixed":"46f66c16a95191d9aca07a72ae6b1252a244e26c"},{"fixed":"b9c4bf133c3c47e23baf4f5403b98a953bf58606"},{"fixed":"138cd190efd56ab36c9fdd8fef8749d06937f24b"},{"fixed":"5a752a616e756844388a1a45404db9fc29fec655"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64446.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.12.0"},{"fixed":"5.10.261"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.212"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.178"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.96"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.39"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64446.json"}}],"schema_version":"1.7.5"}