FKIE_CVE-2026-68197

Vulnerability from fkie_nvd - Published: 2026-08-10 13:20 - Updated: 2026-08-19 17:20
Severity
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/45011e4d9ba3f2182e5df64be65888044fa20771
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8c2058717fd06f05d421c2d3adf1dff3c3abcda1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9375a4ea4121625ef27a46b74781cda66a5cc61b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c3d68e294cbb6a4090bb219d3dcaca85a011809b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cca4398aa305c22016d1714f388e2fa6ea4e5ad4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e1770f7410b4232a0267924f99751dc9c5ca31af
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eb42c3c8fd479166c42984728754cd779c71fd60
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fba7eb7b248ea0618235f504158b685d752a153a
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/marvell/mwifiex/tdls.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e1770f7410b4232a0267924f99751dc9c5ca31af",
              "status": "affected",
              "version": "396939f94084d5923d558e9f22db48bc51156e47",
              "versionType": "git"
            },
            {
              "lessThan": "8c2058717fd06f05d421c2d3adf1dff3c3abcda1",
              "status": "affected",
              "version": "396939f94084d5923d558e9f22db48bc51156e47",
              "versionType": "git"
            },
            {
              "lessThan": "fba7eb7b248ea0618235f504158b685d752a153a",
              "status": "affected",
              "version": "396939f94084d5923d558e9f22db48bc51156e47",
              "versionType": "git"
            },
            {
              "lessThan": "eb42c3c8fd479166c42984728754cd779c71fd60",
              "status": "affected",
              "version": "396939f94084d5923d558e9f22db48bc51156e47",
              "versionType": "git"
            },
            {
              "lessThan": "45011e4d9ba3f2182e5df64be65888044fa20771",
              "status": "affected",
              "version": "396939f94084d5923d558e9f22db48bc51156e47",
              "versionType": "git"
            },
            {
              "lessThan": "9375a4ea4121625ef27a46b74781cda66a5cc61b",
              "status": "affected",
              "version": "396939f94084d5923d558e9f22db48bc51156e47",
              "versionType": "git"
            },
            {
              "lessThan": "cca4398aa305c22016d1714f388e2fa6ea4e5ad4",
              "status": "affected",
              "version": "396939f94084d5923d558e9f22db48bc51156e47",
              "versionType": "git"
            },
            {
              "lessThan": "c3d68e294cbb6a4090bb219d3dcaca85a011809b",
              "status": "affected",
              "version": "396939f94084d5923d558e9f22db48bc51156e47",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/marvell/mwifiex/tdls.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "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",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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)."
    }
  ],
  "id": "CVE-2026-68197",
  "lastModified": "2026-08-19T17:20:35.977",
  "metrics": {},
  "published": "2026-08-10T13:20:07.150",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/45011e4d9ba3f2182e5df64be65888044fa20771"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8c2058717fd06f05d421c2d3adf1dff3c3abcda1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9375a4ea4121625ef27a46b74781cda66a5cc61b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c3d68e294cbb6a4090bb219d3dcaca85a011809b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cca4398aa305c22016d1714f388e2fa6ea4e5ad4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e1770f7410b4232a0267924f99751dc9c5ca31af"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/eb42c3c8fd479166c42984728754cd779c71fd60"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fba7eb7b248ea0618235f504158b685d752a153a"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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