CVE-2026-64442 (GCVE-0-2026-64442)
Vulnerability from cvelistv5
Published
2026-07-25 08:51
Modified
2026-08-17 04:55
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
staging: rtl8723bs: fix OOB reads in IE loops in issue_assocreq() and join_cmd_hdl()
Two IE parsing loops are missing the header bounds checks before they
dereference pIE->length:
- issue_assocreq() walks pmlmeinfo->network.ies to build the
association request. If the stored IE data ends with only an
element_id byte and no length byte, pIE->length is read one byte
past the end of the buffer.
- join_cmd_hdl() walks pnetwork->ies during station join and has
the same problem under the same conditions.
Both buffers are filled from AP beacon and probe-response frames, so a
malicious AP that sends a truncated final IE can trigger the issue.
Apply the two-guard pattern established in update_beacon_info():
1. Break if fewer than sizeof(*pIE) bytes remain.
2. Break if the IE's declared data extends past the buffer end.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 554c0a3abf216c991c5ebddcdb2c08689ecd290b Version: 554c0a3abf216c991c5ebddcdb2c08689ecd290b Version: 554c0a3abf216c991c5ebddcdb2c08689ecd290b Version: 554c0a3abf216c991c5ebddcdb2c08689ecd290b Version: 554c0a3abf216c991c5ebddcdb2c08689ecd290b Version: 554c0a3abf216c991c5ebddcdb2c08689ecd290b Version: 554c0a3abf216c991c5ebddcdb2c08689ecd290b Version: 554c0a3abf216c991c5ebddcdb2c08689ecd290b |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/staging/rtl8723bs/core/rtw_mlme_ext.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"status": "affected",
"version": "4.12"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.96",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.39",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
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"vulnerable": true
},
{
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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-\u003elength:\n\n - issue_assocreq() walks pmlmeinfo-\u003enetwork.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-\u003elength is read one byte\n past the end of the buffer.\n\n - join_cmd_hdl() walks pnetwork-\u003eies 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\u0027s declared data extends past the buffer end."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 8.1,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
},
"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\u0027s 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."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T04:55:44.254Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"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": {
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}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-64442",
"datePublished": "2026-07-25T08:51:14.535Z",
"dateReserved": "2026-07-19T15:36:31.788Z",
"dateUpdated": "2026-08-17T04:55:44.254Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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