CVE-2026-68197 (GCVE-0-2026-68197)
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: mwifiex: fix NULL dereference when the AP has HT-cap but no HT-oper
mwifiex_tdls_add_ht_oper() gates its follow-the-AP-bandwidth path on
bss_desc->bcn_ht_cap being present, but then dereferences a different
pointer, bss_desc->bcn_ht_oper:
if (ISSUPP_CHANWIDTH40(priv->adapter->hw_dot_11n_dev_cap) &&
bss_desc->bcn_ht_cap &&
ISALLOWED_CHANWIDTH40(bss_desc->bcn_ht_oper->ht_param))
bcn_ht_cap and bcn_ht_oper are populated independently while parsing the
associated AP's beacon in mwifiex_update_bss_desc_with_ie(): an AP that
advertises an HT Capabilities element but no HT Operation element leaves
bcn_ht_cap non-NULL and bcn_ht_oper NULL. Setting up a TDLS link to a
peer while associated to such an AP then dereferences the NULL
bcn_ht_oper and crashes the kernel. Every other bcn_ht_oper user in the
driver NULL-checks it first.
Guard on the pointer that is actually dereferenced.
Found by 0sec automated security-research tooling (https://0sec.ai).
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 396939f94084d5923d558e9f22db48bc51156e47 Version: 396939f94084d5923d558e9f22db48bc51156e47 Version: 396939f94084d5923d558e9f22db48bc51156e47 Version: 396939f94084d5923d558e9f22db48bc51156e47 Version: 396939f94084d5923d558e9f22db48bc51156e47 Version: 396939f94084d5923d558e9f22db48bc51156e47 Version: 396939f94084d5923d558e9f22db48bc51156e47 Version: 396939f94084d5923d558e9f22db48bc51156e47 |
||
{
"containers": {
"cna": {
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{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/wireless/marvell/mwifiex/tdls.c"
],
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{
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],
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"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.16"
},
{
"lessThan": "3.16",
"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",
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},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.101",
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},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
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},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.6",
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},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
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},
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mwifiex: fix NULL dereference when the AP has HT-cap but no HT-oper\n\nmwifiex_tdls_add_ht_oper() gates its follow-the-AP-bandwidth path on\nbss_desc-\u003ebcn_ht_cap being present, but then dereferences a different\npointer, bss_desc-\u003ebcn_ht_oper:\n\n\tif (ISSUPP_CHANWIDTH40(priv-\u003eadapter-\u003ehw_dot_11n_dev_cap) \u0026\u0026\n\t bss_desc-\u003ebcn_ht_cap \u0026\u0026\n\t ISALLOWED_CHANWIDTH40(bss_desc-\u003ebcn_ht_oper-\u003eht_param))\n\nbcn_ht_cap and bcn_ht_oper are populated independently while parsing the\nassociated AP\u0027s beacon in mwifiex_update_bss_desc_with_ie(): an AP that\nadvertises an HT Capabilities element but no HT Operation element leaves\nbcn_ht_cap non-NULL and bcn_ht_oper NULL. Setting up a TDLS link to a\npeer while associated to such an AP then dereferences the NULL\nbcn_ht_oper and crashes the kernel. Every other bcn_ht_oper user in the\ndriver NULL-checks it first.\n\nGuard on the pointer that is actually dereferenced.\n\nFound by 0sec automated security-research tooling (https://0sec.ai)."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-19T16:31:16.085Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/e1770f7410b4232a0267924f99751dc9c5ca31af"
},
{
"url": "https://git.kernel.org/stable/c/8c2058717fd06f05d421c2d3adf1dff3c3abcda1"
},
{
"url": "https://git.kernel.org/stable/c/fba7eb7b248ea0618235f504158b685d752a153a"
},
{
"url": "https://git.kernel.org/stable/c/eb42c3c8fd479166c42984728754cd779c71fd60"
},
{
"url": "https://git.kernel.org/stable/c/45011e4d9ba3f2182e5df64be65888044fa20771"
},
{
"url": "https://git.kernel.org/stable/c/9375a4ea4121625ef27a46b74781cda66a5cc61b"
},
{
"url": "https://git.kernel.org/stable/c/cca4398aa305c22016d1714f388e2fa6ea4e5ad4"
},
{
"url": "https://git.kernel.org/stable/c/c3d68e294cbb6a4090bb219d3dcaca85a011809b"
}
],
"title": "wifi: mwifiex: fix NULL dereference when the AP has HT-cap but no HT-oper",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-68197",
"datePublished": "2026-08-10T12:00:15.750Z",
"dateReserved": "2026-07-30T09:28:09.374Z",
"dateUpdated": "2026-08-19T16:31:16.085Z",
"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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