{"id":"CVE-2026-64446","title":"staging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie()","summary":"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…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < a94a643a80a84ceb8139061c3d6bf988d75e45a5","Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 2131621986c62c86109ce4d84cf73a73757eb8a6","Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 6f20d7b0ee47c470734a69379b0fc6647c519603","Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 5d7812360abf3143afcbf5efe4ef242448fa1f28","Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 46f66c16a95191d9aca07a72ae6b1252a244e26c","Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < b9c4bf133c3c47e23baf4f5403b98a953bf58606","Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 138cd190efd56ab36c9fdd8fef8749d06937f24b","Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 5a752a616e756844388a1a45404db9fc29fec655","Linux 4.12"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T16:38:39.866475Z"},"published":"2026-07-25","updated":"2026-11-06","sourceUpdated":"2026-11-06T16:44:52.112Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64446","references":[{"url":"https://git.kernel.org/stable/c/a94a643a80a84ceb8139061c3d6bf988d75e45a5"},{"url":"https://git.kernel.org/stable/c/2131621986c62c86109ce4d84cf73a73757eb8a6"},{"url":"https://git.kernel.org/stable/c/6f20d7b0ee47c470734a69379b0fc6647c519603"},{"url":"https://git.kernel.org/stable/c/5d7812360abf3143afcbf5efe4ef242448fa1f28"},{"url":"https://git.kernel.org/stable/c/46f66c16a95191d9aca07a72ae6b1252a244e26c"},{"url":"https://git.kernel.org/stable/c/b9c4bf133c3c47e23baf4f5403b98a953bf58606"},{"url":"https://git.kernel.org/stable/c/138cd190efd56ab36c9fdd8fef8749d06937f24b"},{"url":"https://git.kernel.org/stable/c/5a752a616e756844388a1a45404db9fc29fec655"}],"tags":["cve.org"],"epss":0.00145,"epssPercentile":0.03806,"ingestedAt":"2026-11-06T16:57:43.180Z","slug":"CVE-2026-64446","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < a94a643a80a84ceb8139061c3d6bf988d75e45a5`\n- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 2131621986c62c86109ce4d84cf73a73757eb8a6`\n- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 6f20d7b0ee47c470734a69379b0fc6647c519603`\n- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 5d7812360abf3143afcbf5efe4ef242448fa1f28`\n- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 46f66c16a95191d9aca07a72ae6b1252a244e26c`\n- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < b9c4bf133c3c47e23baf4f5403b98a953bf58606`\n- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 138cd190efd56ab36c9fdd8fef8749d06937f24b`\n- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 5a752a616e756844388a1a45404db9fc29fec655`\n- `Linux 4.12`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}