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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      "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"
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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/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"
      }
    }
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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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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).\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/wireless/marvell/mwifiex/tdls.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"396939f94084d5923d558e9f22db48bc51156e47\",\"lessThan\":\"e1770f7410b4232a0267924f99751dc9c5ca31af\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"396939f94084d5923d558e9f22db48bc51156e47\",\"lessThan\":\"8c2058717fd06f05d421c2d3adf1dff3c3abcda1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"396939f94084d5923d558e9f22db48bc51156e47\",\"lessThan\":\"fba7eb7b248ea0618235f504158b685d752a153a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"396939f94084d5923d558e9f22db48bc51156e47\",\"lessThan\":\"eb42c3c8fd479166c42984728754cd779c71fd60\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"396939f94084d5923d558e9f22db48bc51156e47\",\"lessThan\":\"45011e4d9ba3f2182e5df64be65888044fa20771\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"396939f94084d5923d558e9f22db48bc51156e47\",\"lessThan\":\"9375a4ea4121625ef27a46b74781cda66a5cc61b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"396939f94084d5923d558e9f22db48bc51156e47\",\"lessThan\":\"cca4398aa305c22016d1714f388e2fa6ea4e5ad4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"396939f94084d5923d558e9f22db48bc51156e47\",\"lessThan\":\"c3d68e294cbb6a4090bb219d3dcaca85a011809b\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/wireless/marvell/mwifiex/tdls.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.16\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.16\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.265\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.216\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.183\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.148\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.101\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.42\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.6\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "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": "2026-08-13T01:28:14Z",
      "cve": "CVE-2026-68197",
      "id": "CVE-2026-68197",
      "initial_release_date": "2026-08-12T16:22:47Z",
      "product_status:known_affected": "193",
      "product_status:known_not_affected": "103",
      "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": "3"
    }
  }
}



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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.

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  • 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.
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