{"id":"CVE-2026-64443","summary":"staging: rtl8723bs: fix OOB read in update_beacon_info() IE loop","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix OOB read in update_beacon_info() IE loop\n\nThe IE parsing loop in update_beacon_info() advances by\n(pIE-\u003elength + 2) each iteration but only guards on i \u003c len.\nWhen a malicious AP sends a Beacon whose last IE has only one byte\nremaining in the frame (the element_id byte lands at len-1), the loop\nreads pIE-\u003elength from one byte past the allocated receive buffer.\n\nAdditionally, even when the header bytes are in bounds, pIE-\u003elength\nitself can extend the data window beyond len, passing a truncated IE\nto the handler functions.\n\nAdd two guards at the top of the loop body:\n  1. Break if fewer than sizeof(*pIE) bytes remain (can't read header).\n  2. Break if the IE's declared data extends past len.\n\nAlso replace i += (pIE-\u003elength + 2) with i += sizeof(*pIE) + pIE-\u003elength\nfor consistency with the sizeof(*pIE) guards added above.","modified":"2026-07-28T04:03:08.535940551Z","published":"2026-07-25T08:51:15.234Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64443.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/5e8db4cff5b45c7c4edc8ae3f302027c3bb32b25"},{"type":"WEB","url":"https://git.kernel.org/stable/c/69f174a0673b6b7a29b851adb60bc450cdc0ecc4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6dd5e8c3011ebabf417257d7f07901a7c4311539"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9193c34f75fd9e1ea8a590d7cced464c3380dc29"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b5cc2f999927f69723ca53f1f2a3aa37dbeda907"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bd953d52d587d42365e399b96c52dbdb13032070"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ed51de4a86e173c3b0ef78e039c2e49e08b11f16"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64443.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64443"},{"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":"5e8db4cff5b45c7c4edc8ae3f302027c3bb32b25"},{"fixed":"6dd5e8c3011ebabf417257d7f07901a7c4311539"},{"fixed":"9193c34f75fd9e1ea8a590d7cced464c3380dc29"},{"fixed":"bd953d52d587d42365e399b96c52dbdb13032070"},{"fixed":"69f174a0673b6b7a29b851adb60bc450cdc0ecc4"},{"fixed":"b5cc2f999927f69723ca53f1f2a3aa37dbeda907"},{"fixed":"ed51de4a86e173c3b0ef78e039c2e49e08b11f16"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64443.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.12.0"},{"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-2026-64443.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"}]}