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HighFix available

staging: rtl8723bs: fix OOB reads in is_ap_in_tkip() IE loop

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB reads in is_ap_in_tkip() IE loop The loop in is_ap_in_tkip() iterates over IEs without verifying that enough bytes remain before dereferencing the IE header or its payload: - pIE->element_id and pIE->length are read without checking that i + sizeof(*pIE) <= ie_length, so a truncated IE at the end of the buffer causes an OOB read. - For WLAN_EID_VENDOR_SPECIFIC the code compares pIE->data + 12, which requires pIE->length >= 16. For WLAN_EID_RSN it compares pIE->data + 8, requiring pIE->length >= 12. Neither requirement is checked. Add the missing IE header and payload bounds checks and guard each data access with an explicit pIE->length minimum, matching the pattern established in update_beacon_info().

Products
Kernel
Affected versions
Not specified
Fixed versions
5.15.212, 6.1.178, 6.12.96, 6.18.39, 6.6.145, 7.1.4
CVEs
CVE-2026-64536
Confirmed fixed CVEs
Not specified
Updated in this feed
7 Nov 2026, 03:02 UTC · Revision 1

Source evidence

staging: rtl8723bs: fix OOB reads in is_ap_in_tkip() IE loop

core-osv · Original source

Published 27 Jul 2026, 06:36 UTC

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB reads in is_ap_in_tkip() IE loop The loop in is_ap_in_tkip() iterates over IEs without verifying that enough bytes remain before dereferencing the IE header or its payload: - pIE->element_id and pIE->length are read without checking that i + sizeof(*pIE) <= ie_length, so a truncated IE at the end of the buffer causes an OOB read. - For WLAN_EID_VENDOR_SPECIFIC the code compares pIE->data + 12, which requires pIE->length >= 16. For WLAN_EID_RSN it compares pIE->data + 8, requiring pIE->length >= 12. Neither requirement is checked. Add the missing IE header and payload bounds checks and guard each data access with an explicit pIE->length minimum, matching the pattern established in update_beacon_info().

osv:CVE-2026-64536

Kernel

Fixed versions: 5.15.212, 6.1.178, 6.6.145, 6.12.96, 6.18.39, 7.1.4

Complete source record
{
  "id": "96fa3672cec6b04ae5eb6f35ee345e4ad70b90a6b8f87409ebc43c540435ddff",
  "url": "https://osv.dev/vulnerability/CVE-2026-64536",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "staging: rtl8723bs: fix OOB reads in is_ap_in_tkip() IE loop",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB reads in is_ap_in_tkip() IE loop The loop in is_ap_in_tkip() iterates over IEs without verifying that enough bytes remain before dereferencing the IE header or its payload: - pIE->element_id and pIE->length are read without checking that i + sizeof(*pIE) <= ie_length, so a truncated IE at the end of the buffer causes an OOB read. - For WLAN_EID_VENDOR_SPECIFIC the code compares pIE->data + 12, which requires pIE->length >= 16. For WLAN_EID_RSN it compares pIE->data + 8, requiring pIE->length >= 12. Neither requirement is checked. Add the missing IE header and payload bounds checks and guard each data access with an explicit pIE->length minimum, matching the pattern established in update_beacon_info().",
    "evidence": "osv:CVE-2026-64536",
    "products": [
      {
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          "value": "Kernel",
          "evidence": "/affected/1/package/name"
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        "prerequisites": [],
        "fixed_versions": [
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            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
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        "affected_versions": []
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    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-64536",
      "aliases": [
        "CVE-2026-64536"
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      "metrics": [
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          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
        }
      ],
      "affected": [
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        {
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                  "introduced": "4.12.0"
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            {
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                {
                  "introduced": "6.2.0"
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            },
            {
              "type": "ECOSYSTEM",
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                  "introduced": "6.7.0"
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            {
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          ],
          "package": {
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            "ecosystem": "Linux"
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          "database_specific": {
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      ],
      "modified": "2026-10-28T02:30:49.083113729Z",
      "provider": "osv",
      "references": [
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        "https://git.kernel.org/stable/c/3bf39f711ff27c64be8680a8938bcc5001982e81",
        "https://git.kernel.org/stable/c/4380b3860d887a13555ff024a58dfc05b490dfd6",
        "https://git.kernel.org/stable/c/6f26cc55affd9d7f88ae2f5d12db4ecf9072c209",
        "https://git.kernel.org/stable/c/a6105ea8ca6ebbc04beaf3bcbf7dbb5985f5d395",
        "https://git.kernel.org/stable/c/d2055332297e24c63fffda943ef7a5eefc0a6019",
        "https://git.kernel.org/stable/c/ea3809f7e20bdff282b8cc1e94937d5fb9fb32c7",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64536.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-64536",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64536.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-64536",
        "evidence": "/id"
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    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517592,
  "published_at": "2026-07-27T06:36:04.736+00:00"
}