CVE-2026-68199 (GCVE-0-2026-68199)
Vulnerability from cvelistv5
Published
2026-08-10 12:00
Modified
2026-08-19 16:31
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
wifi: ath6kl: fix OOB access from firmware ADDBA window size
aggr_recv_addba_req_evt() logs a debug message when the firmware-supplied
win_sz is outside [AGGR_WIN_SZ_MIN, AGGR_WIN_SZ_MAX] but does not
return. The out-of-range win_sz is then used in TID_WINDOW_SZ() to
compute a kzalloc size and stored in rxtid->hold_q_sz, leading to
zero-size or overflowed allocations and subsequent out-of-bounds access.
Clean up any previously active aggregation session for the TID first,
then return early when win_sz is out of the valid range, instead of
proceeding with a broken allocation size.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: bdcd81707973cf8aa9305337166f8ee842a050d4 Version: bdcd81707973cf8aa9305337166f8ee842a050d4 Version: bdcd81707973cf8aa9305337166f8ee842a050d4 Version: bdcd81707973cf8aa9305337166f8ee842a050d4 Version: bdcd81707973cf8aa9305337166f8ee842a050d4 Version: bdcd81707973cf8aa9305337166f8ee842a050d4 Version: bdcd81707973cf8aa9305337166f8ee842a050d4 Version: bdcd81707973cf8aa9305337166f8ee842a050d4 |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/wireless/ath/ath6kl/txrx.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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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": "3.2"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.42",
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},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
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"nodes": [
{
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"vulnerable": true
},
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}
],
"negate": false,
"operator": "OR"
}
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath6kl: fix OOB access from firmware ADDBA window size\n\naggr_recv_addba_req_evt() logs a debug message when the firmware-supplied\nwin_sz is outside [AGGR_WIN_SZ_MIN, AGGR_WIN_SZ_MAX] but does not\nreturn. The out-of-range win_sz is then used in TID_WINDOW_SZ() to\ncompute a kzalloc size and stored in rxtid-\u003ehold_q_sz, leading to\nzero-size or overflowed allocations and subsequent out-of-bounds access.\n\nClean up any previously active aggregation session for the TID first,\nthen return early when win_sz is out of the valid range, instead of\nproceeding with a broken allocation size."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 8.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:A - Exploitation requires a malicious WiFi peer (rogue AP or associated client) to trigger ADDBA handling; firmware passes WMI_ADDBA_REQ_EVENTID over the radio link to the ath6kl driver, placing the attacker on the same wireless segment rather than a remote IP network path.\nAC:L - An adjacent attacker can reliably send crafted 802.11 ADDBA requests with out-of-range buffer/window sizes to firmware, which forwards the invalid win_sz to the host; no special memory layout, race, or rare timing is required beyond normal WiFi association.\nPR:N - No local Linux privileges are needed; any associated WiFi peer can induce the malformed ADDBA event. The bug is not reachable via user namespaces or unprivileged local syscalls without controlling the WiFi link/firmware messages.\nUI:N - Once the victim device is associated to WiFi (common on phones, embedded, and IoT), the attacker can send ADDBA and follow-up data frames without any additional victim action beyond routine wireless connectivity.\nS:U - Heap corruption and kernel privilege escalation occur within the same kernel security domain; this is not a VM escape, IOMMU bypass, or cross-authority sandbox breakout.\nC:H - Out-of-bounds access to hold_q allows reading/writing adjacent kernel heap memory (e.g., skb pointers and metadata); OOB kernel heap access is treated as arbitrary memory disclosure potential per kernel CVSS guidance.\nI:H - OOB writes to hold_q entries (struct sk_buff pointers, is_amsdu, seq_no) corrupt kernel heap state and can be leveraged for control-flow hijacking and local privilege escalation, not merely a bounded modification.\nA:H - Invalid win_sz can yield zero-size allocations and hold_q_sz=0 (divide-by-zero in AGGR_WIN_IDX) or inconsistent buffers, causing kernel oops/panic or persistent disruption when aggregation receives subsequent frames."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-19T16:31:18.842Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/c8e3ca7954d8233fbc54bd370c1827670f43c538"
},
{
"url": "https://git.kernel.org/stable/c/f480d9910fcfe326db3a6281df80e83af347193e"
},
{
"url": "https://git.kernel.org/stable/c/67bc9af4f41f2bdba20404fbd753b2a1bd6dd352"
},
{
"url": "https://git.kernel.org/stable/c/d4558c140782180e2c80a7588a4af9f8675adfc4"
},
{
"url": "https://git.kernel.org/stable/c/5a65fd4722416061698b0a3277222381efbc4882"
},
{
"url": "https://git.kernel.org/stable/c/58c6c8dc2e022e1b4f3dc58725a1ca49ff470f9c"
},
{
"url": "https://git.kernel.org/stable/c/cec0a487cf38ac1f9bca240ffe8a94c5014b72f2"
},
{
"url": "https://git.kernel.org/stable/c/44126b6994eeb28f2103b638e698f40a1244f327"
}
],
"title": "wifi: ath6kl: fix OOB access from firmware ADDBA window size",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-68199",
"datePublished": "2026-08-10T12:00:18.278Z",
"dateReserved": "2026-07-30T09:28:09.374Z",
"dateUpdated": "2026-08-19T16:31:18.842Z",
"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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