CVE-2026-68197 (GCVE-0-2026-68197)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:00 – Updated: 2026-08-19 16:31
VLAI
Title
wifi: mwifiex: fix NULL dereference when the AP has HT-cap but no HT-oper
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).
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 396939f94084d5923d558e9f22db48bc51156e47 , < e1770f7410b4232a0267924f99751dc9c5ca31af (git)
Affected: 396939f94084d5923d558e9f22db48bc51156e47 , < 8c2058717fd06f05d421c2d3adf1dff3c3abcda1 (git)
Affected: 396939f94084d5923d558e9f22db48bc51156e47 , < fba7eb7b248ea0618235f504158b685d752a153a (git)
Affected: 396939f94084d5923d558e9f22db48bc51156e47 , < eb42c3c8fd479166c42984728754cd779c71fd60 (git)
Affected: 396939f94084d5923d558e9f22db48bc51156e47 , < 45011e4d9ba3f2182e5df64be65888044fa20771 (git)
Affected: 396939f94084d5923d558e9f22db48bc51156e47 , < 9375a4ea4121625ef27a46b74781cda66a5cc61b (git)
Affected: 396939f94084d5923d558e9f22db48bc51156e47 , < cca4398aa305c22016d1714f388e2fa6ea4e5ad4 (git)
Affected: 396939f94084d5923d558e9f22db48bc51156e47 , < c3d68e294cbb6a4090bb219d3dcaca85a011809b (git)
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Linux Linux Affected: 3.16
Unaffected: 0 , < 3.16 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.148 , ≤ 6.6.* (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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          "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": [
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          "url": "https://git.kernel.org/stable/c/e1770f7410b4232a0267924f99751dc9c5ca31af"
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          "url": "https://git.kernel.org/stable/c/8c2058717fd06f05d421c2d3adf1dff3c3abcda1"
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        },
        {
          "url": "https://git.kernel.org/stable/c/eb42c3c8fd479166c42984728754cd779c71fd60"
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          "url": "https://git.kernel.org/stable/c/45011e4d9ba3f2182e5df64be65888044fa20771"
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        {
          "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"
      }
    }
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    "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"
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            "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)."
          }
        ],
        "id": "CVE-2026-68197",
        "lastModified": "2026-08-19T17:20:35.977",
        "metrics": {},
        "published": "2026-08-10T13:20:07.150",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-11T12:30:00+00:00",
      "cve": "CVE-2026-68197",
      "id": "CVE-2026-68197",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: mwifiex: fix NULL dereference when the AP has HT-cap but no HT-oper",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68197.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-18T00:34:28Z",
      "cve": "CVE-2026-68197",
      "id": "CVE-2026-68197",
      "initial_release_date": "2026-08-12T16:22:47Z",
      "product_status:first_fixed": "23",
      "product_status:known_affected": "671",
      "product_status:known_not_affected": "60",
      "product_status:recommended": "107",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68197",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68197.json",
      "version": "10"
    }
  }
}



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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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.