CVE-2026-64442

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If the stored IE data ends with only an\n element_id byte and no length byte, pIE->length is read one byte\n past the end of the buffer.\n\n - join_cmd_hdl() walks pnetwork->ies during station join and has\n the same problem under the same conditions.\n\nBoth buffers are filled from AP beacon and probe-response frames, so a\nmalicious AP that sends a truncated final IE can trigger the issue.\n\nApply the two-guard pattern established in update_beacon_info():\n 1. Break if fewer than sizeof(*pIE) bytes remain.\n 2. Break if the IE's declared data extends past the buffer end."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "baseScore": 8.1, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:A - A malicious AP within WiFi radio range can supply crafted beacon or probe-response IEs that reach both vulnerable loops during connection.\nAC:L - The attacker directly controls the IE layout and declared lengths, and triggering requires no race or condition outside attacker control.\nPR:N - join_cmd_hdl() executes before authentication, while issue_assocreq() precedes WPA/802.1X credential verification; the rogue AP needs no valid credentials.\nUI:N - Devices can automatically reconnect to a rogue AP spoofing a saved SSID, so no contemporaneous victim action is required.\nS:U - The vulnerable parser and resulting impacts remain within the host kernel's existing security authority.\nC:H - A malicious length can cause reads of up to 255 bytes beyond the logical IE boundary, including kernel pointers or state, and issue_assocreq() can transmit those bytes to the attacking AP.\nI:N - The defect performs out-of-bounds reads and copies into legitimate destinations, without providing an out-of-bounds or arbitrary write primitive.\nA:H - The malformed lengths drive unchecked kernel-context reads through multiple handlers and can cause an oops or kernel fault; an adjacent attacker can repeat the trigger during connection attempts."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/staging/rtl8723bs/core/rtw_mlme_ext.c"], "versions": [{"version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "bc881c9915c4468747d0ca5fd1abd7b313cfb0f4", "status": "affected", "versionType": "git"}, {"version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "605ebd94d0f469204f3c9f2f84acc71e43e2780f", "status": "affected", "versionType": "git"}, {"version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "a830bdc82461353bf7b1f8a2ad2689bf5d2de444", "status": "affected", "versionType": "git"}, {"version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "4c21eec80cf502d9ea18e0b946246b2376452786", "status": "affected", "versionType": "git"}, {"version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "ad2637c46ef8b8ae0894372a2d39fdfcdc420a1e", "status": "affected", "versionType": "git"}, {"version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "c38d16b1ffac385c9e4b38447cd5c46af1114b58", "status": "affected", "versionType": "git"}, {"version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "402f13ec95945f34a210b28df1f8740d3d4a58c5", "status": "affected", "versionType": "git"}, {"version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "ef61d628dfad38fead1fd2e08979ae9126d011d5", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/staging/rtl8723bs/core/rtw_mlme_ext.c"], "versions": [{"version": "4.12", "status": "affected"}, {"version": "0", "lessThan": "4.12", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.96", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.12.96"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/bc881c9915c4468747d0ca5fd1abd7b313cfb0f4"}, {"url": "https://git.kernel.org/stable/c/605ebd94d0f469204f3c9f2f84acc71e43e2780f"}, {"url": "https://git.kernel.org/stable/c/a830bdc82461353bf7b1f8a2ad2689bf5d2de444"}, {"url": "https://git.kernel.org/stable/c/4c21eec80cf502d9ea18e0b946246b2376452786"}, {"url": "https://git.kernel.org/stable/c/ad2637c46ef8b8ae0894372a2d39fdfcdc420a1e"}, {"url": "https://git.kernel.org/stable/c/c38d16b1ffac385c9e4b38447cd5c46af1114b58"}, {"url": "https://git.kernel.org/stable/c/402f13ec95945f34a210b28df1f8740d3d4a58c5"}, {"url": "https://git.kernel.org/stable/c/ef61d628dfad38fead1fd2e08979ae9126d011d5"}], "title": "staging: rtl8723bs: fix OOB reads in IE loops in issue_assocreq() and join_cmd_hdl()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-64442", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T15:40:51.646471Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-125", "description": "CWE-125 Out-of-bounds Read"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T20:38:29.506Z"}}]}}

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the rogue AP needs no valid credentials.\nUI:N - Devices can automatically reconnect to a rogue AP spoofing a saved SSID, so no contemporaneous victim action is required.\nS:U - The vulnerable parser and resulting impacts remain within the host kernel's existing security authority.\nC:H - A malicious length can cause reads of up to 255 bytes beyond the logical IE boundary, including kernel pointers or state, and issue_assocreq() can transmit those bytes to the attacking AP.\nI:N - The defect performs out-of-bounds reads and copies into legitimate destinations, without providing an out-of-bounds or arbitrary write primitive.\nA:H - The malformed lengths drive unchecked kernel-context reads through multiple handlers and can cause an oops or kernel fault; an adjacent attacker can repeat the trigger during connection attempts."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "bc881c9915c4468747d0ca5fd1abd7b313cfb0f4", "versionType": "git"}, {"status": "affected", "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "605ebd94d0f469204f3c9f2f84acc71e43e2780f", "versionType": "git"}, {"status": "affected", "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "a830bdc82461353bf7b1f8a2ad2689bf5d2de444", "versionType": "git"}, {"status": "affected", "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "4c21eec80cf502d9ea18e0b946246b2376452786", "versionType": "git"}, {"status": "affected", "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "ad2637c46ef8b8ae0894372a2d39fdfcdc420a1e", "versionType": "git"}, {"status": "affected", "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "c38d16b1ffac385c9e4b38447cd5c46af1114b58", "versionType": "git"}, {"status": "affected", "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "402f13ec95945f34a210b28df1f8740d3d4a58c5", "versionType": "git"}, {"status": "affected", "version": "554c0a3abf216c991c5ebddcdb2c08689ecd290b", "lessThan": "ef61d628dfad38fead1fd2e08979ae9126d011d5", "versionType": "git"}], "programFiles": ["drivers/staging/rtl8723bs/core/rtw_mlme_ext.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.12"}, {"status": "unaffected", "version": "0", "lessThan": "4.12", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.261", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.212", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.178", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.145", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.96", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.39", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.4", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/staging/rtl8723bs/core/rtw_mlme_ext.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/bc881c9915c4468747d0ca5fd1abd7b313cfb0f4"}, {"url": "https://git.kernel.org/stable/c/605ebd94d0f469204f3c9f2f84acc71e43e2780f"}, {"url": "https://git.kernel.org/stable/c/a830bdc82461353bf7b1f8a2ad2689bf5d2de444"}, {"url": "https://git.kernel.org/stable/c/4c21eec80cf502d9ea18e0b946246b2376452786"}, {"url": "https://git.kernel.org/stable/c/ad2637c46ef8b8ae0894372a2d39fdfcdc420a1e"}, {"url": "https://git.kernel.org/stable/c/c38d16b1ffac385c9e4b38447cd5c46af1114b58"}, {"url": "https://git.kernel.org/stable/c/402f13ec95945f34a210b28df1f8740d3d4a58c5"}, {"url": "https://git.kernel.org/stable/c/ef61d628dfad38fead1fd2e08979ae9126d011d5"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix OOB reads in IE loops in issue_assocreq() and join_cmd_hdl()\n\nTwo IE parsing loops are missing the header bounds checks before they\ndereference pIE->length:\n\n - issue_assocreq() walks pmlmeinfo->network.ies to build the\n association request. If the stored IE data ends with only an\n element_id byte and no length byte, pIE->length is read one byte\n past the end of the buffer.\n\n - join_cmd_hdl() walks pnetwork->ies during station join and has\n the same problem under the same conditions.\n\nBoth buffers are filled from AP beacon and probe-response frames, so a\nmalicious AP that sends a truncated final IE can trigger the issue.\n\nApply the two-guard pattern established in update_beacon_info():\n 1. Break if fewer than sizeof(*pIE) bytes remain.\n 2. Break if the IE's declared data extends past the buffer end."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.261", "versionStartIncluding": "4.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.212", "versionStartIncluding": "4.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.178", "versionStartIncluding": "4.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.145", "versionStartIncluding": "4.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.96", "versionStartIncluding": "4.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.39", "versionStartIncluding": "4.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.4", "versionStartIncluding": "4.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "4.12"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:55:44.254Z"}}}, "cveMetadata": {"cveId": "CVE-2026-64442", "state": "PUBLISHED", "dateUpdated": "2026-10-19T20:38:29.506Z", "dateReserved": "2026-07-19T15:36:31.788Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-07-25T08:51:14.535Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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If the stored IE data ends with only an\n element_id byte and no length byte, pIE->length is read one byte\n past the end of the buffer.\n\n - join_cmd_hdl() walks pnetwork->ies during station join and has\n the same problem under the same conditions.\n\nBoth buffers are filled from AP beacon and probe-response frames, so a\nmalicious AP that sends a truncated final IE can trigger the issue.\n\nApply the two-guard pattern established in update_beacon_info():\n 1. Break if fewer than sizeof(*pIE) bytes remain.\n 2. Break if the IE's declared data extends past the buffer end."}], "id": "CVE-2026-64442", "lastModified": "2026-10-19T21:17:38.747", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64442", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:40:51.646471Z", "version": "2.0.3"}}]}, "published": "2026-07-25T10:17:28.793", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/402f13ec95945f34a210b28df1f8740d3d4a58c5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4c21eec80cf502d9ea18e0b946246b2376452786"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/605ebd94d0f469204f3c9f2f84acc71e43e2780f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a830bdc82461353bf7b1f8a2ad2689bf5d2de444"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ad2637c46ef8b8ae0894372a2d39fdfcdc420a1e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bc881c9915c4468747d0ca5fd1abd7b313cfb0f4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c38d16b1ffac385c9e4b38447cd5c46af1114b58"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ef61d628dfad38fead1fd2e08979ae9126d011d5"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-125"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: staging: rtl8723bs: fix OOB reads in IE loops in issue_assocreq() and join_cmd_hdl()", "id": "2507269", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507269"}, "csaw": false, "cwe": "CWE-125", "details": ["A flaw was found in the Linux kernel's `rtl8723bs` Wi-Fi driver. Insufficient boundary checks in the information element (IE) parsing loops within the `issue_assocreq()` and `join_cmd_hdl()` functions allow a remote attacker to cause an out-of-bounds read. By sending specially crafted, truncated IE data from a malicious Wi-Fi Access Point, an attacker could trigger a system crash, leading to a denial of service."], "name": "CVE-2026-64442", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64442\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64442\nhttps://lore.kernel.org/linux-cve-announce/2026072539-CVE-2026-64442-7060@gregkh/T"]}

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