{"id":"CVE-2026-64443","title":"staging: rtl8723bs: fix OOB read in update_beacon_info() IE loop","summary":"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->length + 2) each iteration but only guar…","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 5e8db4cff5b45c7c4edc8ae3f302027c3bb32b25","Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 6dd5e8c3011ebabf417257d7f07901a7c4311539","Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 9193c34f75fd9e1ea8a590d7cced464c3380dc29","Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < bd953d52d587d42365e399b96c52dbdb13032070","Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 69f174a0673b6b7a29b851adb60bc450cdc0ecc4","Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < b5cc2f999927f69723ca53f1f2a3aa37dbeda907","Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < ed51de4a86e173c3b0ef78e039c2e49e08b11f16","Linux 4.12"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-16T15:40:53.876241Z"},"published":"2026-07-25","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:42:36.546Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64443","references":[{"url":"https://git.kernel.org/stable/c/5e8db4cff5b45c7c4edc8ae3f302027c3bb32b25"},{"url":"https://git.kernel.org/stable/c/6dd5e8c3011ebabf417257d7f07901a7c4311539"},{"url":"https://git.kernel.org/stable/c/9193c34f75fd9e1ea8a590d7cced464c3380dc29"},{"url":"https://git.kernel.org/stable/c/bd953d52d587d42365e399b96c52dbdb13032070"},{"url":"https://git.kernel.org/stable/c/69f174a0673b6b7a29b851adb60bc450cdc0ecc4"},{"url":"https://git.kernel.org/stable/c/b5cc2f999927f69723ca53f1f2a3aa37dbeda907"},{"url":"https://git.kernel.org/stable/c/ed51de4a86e173c3b0ef78e039c2e49e08b11f16"}],"tags":["cve.org"],"epss":0.0028,"epssPercentile":0.19083,"ingestedAt":"2026-10-16T17:24:46.820Z","slug":"CVE-2026-64443","body":"## Overview\n\nIn 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->length + 2) each iteration but only guards on i < 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->length from one byte past the allocated receive buffer.\n\nAdditionally, even when the header bytes are in bounds, pIE->length\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->length + 2) with i += sizeof(*pIE) + pIE->length\nfor consistency with the sizeof(*pIE) guards added above.\n\n## Affected\n\n- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 5e8db4cff5b45c7c4edc8ae3f302027c3bb32b25`\n- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 6dd5e8c3011ebabf417257d7f07901a7c4311539`\n- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 9193c34f75fd9e1ea8a590d7cced464c3380dc29`\n- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < bd953d52d587d42365e399b96c52dbdb13032070`\n- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 69f174a0673b6b7a29b851adb60bc450cdc0ecc4`\n- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < b5cc2f999927f69723ca53f1f2a3aa37dbeda907`\n- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < ed51de4a86e173c3b0ef78e039c2e49e08b11f16`\n- `Linux 4.12`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}