{"id":"CVE-2026-64446","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-64446","generatedAt":"2026-10-28T04:11:23.799Z","title":"In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie() supplicant_ie is a 256-byte array in struct security_priv.","description":"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->securitypriv.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.","published":"2026-07-25T10:17:29.000Z","lastModified":"2026-09-03T15:38:02.000Z","status":"Analyzed","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","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"},"cwe":["CWE-787"],"affected":["linux/linux kernel"],"epss":{"score":0.00145,"percentile":0.03755,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.14%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/138cd190efd56ab36c9fdd8fef8749d06937f24b","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2131621986c62c86109ce4d84cf73a73757eb8a6","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/46f66c16a95191d9aca07a72ae6b1252a244e26c","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5a752a616e756844388a1a45404db9fc29fec655","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5d7812360abf3143afcbf5efe4ef242448fa1f28","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6f20d7b0ee47c470734a69379b0fc6647c519603","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a94a643a80a84ceb8139061c3d6bf988d75e45a5","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b9c4bf133c3c47e23baf4f5403b98a953bf58606","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64446","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}