CVE-2026-64536 (GCVE-0-2026-64536)
Vulnerability from cvelistv5 – Published: 2026-07-27 06:36 – Updated: 2026-08-17 04:57
VLAI
EPSS
VEX
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().
Severity
8.1 (High)
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
554c0a3abf216c991c5ebddcdb2c08689ecd290b , < ea3809f7e20bdff282b8cc1e94937d5fb9fb32c7
(git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < d2055332297e24c63fffda943ef7a5eefc0a6019 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 6f26cc55affd9d7f88ae2f5d12db4ecf9072c209 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 204b22c8df115370037248859bf0fa62db73a396 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < a6105ea8ca6ebbc04beaf3bcbf7dbb5985f5d395 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 4380b3860d887a13555ff024a58dfc05b490dfd6 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 3bf39f711ff27c64be8680a8938bcc5001982e81 (git) |
guessed | |
| Linux | Linux |
Affected:
4.12
Unaffected: 0 , < 4.12 (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
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{
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"product": "Linux",
"programFiles": [
"drivers/staging/rtl8723bs/core/rtw_wlan_util.c"
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.12"
},
{
"lessThan": "4.12",
"status": "unaffected",
"version": "0",
"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": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.212",
"versionStartIncluding": "4.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.178",
"versionStartIncluding": "4.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.145",
"versionStartIncluding": "4.12",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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},
{
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"versionEndExcluding": "6.18.39",
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"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.4",
"versionStartIncluding": "4.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "4.12",
"vulnerable": true
}
],
"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 is_ap_in_tkip() IE loop\n\nThe loop in is_ap_in_tkip() iterates over IEs without verifying that\nenough bytes remain before dereferencing the IE header or its payload:\n\n- pIE-\u003eelement_id and pIE-\u003elength are read without checking that\n i + sizeof(*pIE) \u003c= ie_length, so a truncated IE at the end of the\n buffer causes an OOB read.\n\n- For WLAN_EID_VENDOR_SPECIFIC the code compares pIE-\u003edata + 12,\n which requires pIE-\u003elength \u003e= 16. For WLAN_EID_RSN it compares\n pIE-\u003edata + 8, requiring pIE-\u003elength \u003e= 12. Neither requirement\n is checked.\n\nAdd the missing IE header and payload bounds checks and guard each\ndata access with an explicit pIE-\u003elength minimum, matching the\npattern established in update_beacon_info()."
}
],
"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 nearby malicious WiFi access point can supply crafted beacon or probe-response IEs that reach the vulnerable association path over the air.\nAC:L - The attacker directly controls the malformed IE lengths and contents, and exploitation requires neither a race nor conditions outside the attacker\u0027s control.\nPR:N - The vulnerable code executes before WPA credentials are verified; transmitting management frames as a malicious or spoofed AP requires no privileges on the target.\nUI:N - An attacker impersonating a configured AP can trigger the path during automatic connection or reconnection without contemporaneous user action.\nS:U - The vulnerable driver and affected kernel resources belong to the same host security authority, with no demonstrated VM, sandbox, or IOMMU boundary crossing.\nC:H - The unchecked IE-header and fixed-offset comparisons read beyond attacker-declared buffer boundaries into adjacent kernel memory; under the required conservative OOB-read rule, confidentiality impact is high.\nI:N - The flaw performs reads and comparisons only, with no memory write or demonstrated data-modification primitive.\nA:H - Malformed IEs can cause kernel out-of-bounds accesses during association and potentially fault or oops the kernel; a nearby attacker can repeat the exchange."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T04:57:12.274Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/ea3809f7e20bdff282b8cc1e94937d5fb9fb32c7"
},
{
"url": "https://git.kernel.org/stable/c/d2055332297e24c63fffda943ef7a5eefc0a6019"
},
{
"url": "https://git.kernel.org/stable/c/6f26cc55affd9d7f88ae2f5d12db4ecf9072c209"
},
{
"url": "https://git.kernel.org/stable/c/204b22c8df115370037248859bf0fa62db73a396"
},
{
"url": "https://git.kernel.org/stable/c/a6105ea8ca6ebbc04beaf3bcbf7dbb5985f5d395"
},
{
"url": "https://git.kernel.org/stable/c/4380b3860d887a13555ff024a58dfc05b490dfd6"
},
{
"url": "https://git.kernel.org/stable/c/3bf39f711ff27c64be8680a8938bcc5001982e81"
}
],
"title": "staging: rtl8723bs: fix OOB reads in is_ap_in_tkip() IE loop",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
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"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-64536",
"datePublished": "2026-07-27T06:36:04.736Z",
"dateReserved": "2026-07-19T15:36:31.795Z",
"dateUpdated": "2026-08-17T04:57:12.274Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-64536",
"date": "2026-09-30",
"epss": "0.00409",
"percentile": "0.32711"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/staging/rtl8723bs/core/rtw_wlan_util.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"defaultStatus": "affected",
"product": "Linux",
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
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},
{
"lessThan": "4.12",
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},
{
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"version": "6.1.178",
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},
{
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},
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},
{
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"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
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"version": "7.2",
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}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix OOB reads in is_ap_in_tkip() IE loop\n\nThe loop in is_ap_in_tkip() iterates over IEs without verifying that\nenough bytes remain before dereferencing the IE header or its payload:\n\n- pIE-\u003eelement_id and pIE-\u003elength are read without checking that\n i + sizeof(*pIE) \u003c= ie_length, so a truncated IE at the end of the\n buffer causes an OOB read.\n\n- For WLAN_EID_VENDOR_SPECIFIC the code compares pIE-\u003edata + 12,\n which requires pIE-\u003elength \u003e= 16. For WLAN_EID_RSN it compares\n pIE-\u003edata + 8, requiring pIE-\u003elength \u003e= 12. Neither requirement\n is checked.\n\nAdd the missing IE header and payload bounds checks and guard each\ndata access with an explicit pIE-\u003elength minimum, matching the\npattern established in update_beacon_info()."
}
],
"id": "CVE-2026-64536",
"lastModified": "2026-08-17T05:17:58.493",
"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"
}
]
},
"published": "2026-07-27T08:16:22.890",
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"url": "https://git.kernel.org/stable/c/204b22c8df115370037248859bf0fa62db73a396"
},
{
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},
{
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}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
},
"redhat_vex": {
"aggregate_severity": "None",
"current_release_date": "2026-08-05T12:42:06+00:00",
"cve": "CVE-2026-64536",
"id": "CVE-2026-64536",
"initial_release_date": "2026-07-27T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: staging: rtl8723bs: fix OOB reads in is_ap_in_tkip() IE loop",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64536.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-22T16:51:37Z",
"cve": "CVE-2026-64536",
"id": "CVE-2026-64536",
"initial_release_date": "2026-07-27T16:59:59Z",
"product_status:first_fixed": "60",
"product_status:known_affected": "669",
"product_status:known_not_affected": "64",
"product_status:recommended": "111",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-64536",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64536.json",
"version": "13"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
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