CVE-2026-64446 (GCVE-0-2026-64446)
Vulnerability from cvelistv5 – Published: 2026-07-25 08:51 – Updated: 2026-11-06 16:44
VLAI
EPSS
VEX
Title
staging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie()
Summary
In the Linux kernel, the following vulnerability has been resolved:
staging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie()
supplicant_ie is a 256-byte array in struct security_priv. The WPA and
WPA2 IE copy paths use:
memcpy(padapter->securitypriv.supplicant_ie, &pwpa[0], wpa_ielen + 2);
where wpa_ielen is the raw IE length field (u8, 0-255). When a local user
supplies a connect request via nl80211 with a crafted WPA IE of length 255,
wpa_ielen + 2 equals 257, overflowing the 256-byte buffer by one byte into
the adjacent last_mic_err_time field.
rtw_parse_wpa_ie() does not prevent this: its length consistency check
compares *(wpa_ie+1) against (u8)(wpa_ie_len-2), which is (u8)(255) == 255
when wpa_ie_len = 257, so the check passes silently.
Add explicit bounds checks for both the WPA and WPA2 paths before the
memcpy, rejecting any IE whose total size (wpa_ielen + 2) exceeds the
supplicant_ie buffer.
Severity
No CVSS data available.
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-06 16:38 UTC
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
554c0a3abf216c991c5ebddcdb2c08689ecd290b , < a94a643a80a84ceb8139061c3d6bf988d75e45a5
(git)
Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 2131621986c62c86109ce4d84cf73a73757eb8a6 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 6f20d7b0ee47c470734a69379b0fc6647c519603 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 5d7812360abf3143afcbf5efe4ef242448fa1f28 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 46f66c16a95191d9aca07a72ae6b1252a244e26c (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < b9c4bf133c3c47e23baf4f5403b98a953bf58606 (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 138cd190efd56ab36c9fdd8fef8749d06937f24b (git) Affected: 554c0a3abf216c991c5ebddcdb2c08689ecd290b , < 5a752a616e756844388a1a45404db9fc29fec655 (git) |
guessed | |
| Linux | Linux |
Affected:
4.12
Unaffected: 0 , < 4.12 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (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 |
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{
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"url": "https://git.kernel.org/stable/c/46f66c16a95191d9aca07a72ae6b1252a244e26c"
},
{
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"url": "https://git.kernel.org/stable/c/5a752a616e756844388a1a45404db9fc29fec655"
},
{
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"tags": [
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},
{
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},
{
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],
"url": "https://git.kernel.org/stable/c/a94a643a80a84ceb8139061c3d6bf988d75e45a5"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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],
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}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-787"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-11-05T22:04:42+00:00",
"cve": "CVE-2026-64446",
"id": "CVE-2026-64446",
"initial_release_date": "2026-07-25T00:00:00+00:00",
"product_status:known_not_affected": "200",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: staging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64446.json",
"version": "3"
},
"vulnrichment": {
"containers": {
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{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-64446",
"options": [
{
"Exploitation": "none"
},
{
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},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-11-06T16:38:39.866475Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-11-06T16:38:41.455Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
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{
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"product": "Linux",
"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"vendor": "Linux",
"versions": [
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{
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{
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},
{
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"version": "5.15.212",
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},
{
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},
{
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},
{
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},
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},
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{
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie()\n\nsupplicant_ie is a 256-byte array in struct security_priv. The WPA and\nWPA2 IE copy paths use:\n\n memcpy(padapter-\u003esecuritypriv.supplicant_ie, \u0026pwpa[0], wpa_ielen + 2);\n\nwhere wpa_ielen is the raw IE length field (u8, 0-255). When a local user\nsupplies a connect request via nl80211 with a crafted WPA IE of length 255,\nwpa_ielen + 2 equals 257, overflowing the 256-byte buffer by one byte into\nthe adjacent last_mic_err_time field.\n\nrtw_parse_wpa_ie() does not prevent this: its length consistency check\ncompares *(wpa_ie+1) against (u8)(wpa_ie_len-2), which is (u8)(255) == 255\nwhen wpa_ie_len = 257, so the check passes silently.\n\nAdd explicit bounds checks for both the WPA and WPA2 paths before the\nmemcpy, rejecting any IE whose total size (wpa_ielen + 2) exceeds the\nsupplicant_ie buffer."
}
],
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{
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"title": "staging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie()",
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"cveId": "CVE-2026-64446",
"datePublished": "2026-07-25T08:51:17.402Z",
"dateReserved": "2026-07-19T15:36:31.788Z",
"dateUpdated": "2026-11-06T16:44:52.112Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
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}
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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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
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.