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wifi: cfg80211: bound element ID read when checking non-inheritance

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: bound element ID read when checking non-inheritance cfg80211_is_element_inherited() reads the first data octet of the candidate element (id = elem->data[0]) to look it up in an extension non-inheritance list. It does so after testing elem->id, but without verifying that the element actually has a data octet. A zero-length extension element (WLAN_EID_EXTENSION with length 0) therefore makes it read one octet past the end of the element. _ieee802_11_parse_elems_full() runs this check for every element of a frame once a non-inheritance context exists -- e.g. while parsing a per-STA profile of a Multi-Link element in a (re)association response, or a non-transmitted BSS profile -- so a crafted frame from an AP can trigger a one-octet slab-out-of-bounds read during element parsing: BUG: KASAN: slab-out-of-bounds in cfg80211_is_element_inherited Read of size 1 ... in net/wireless/scan.c Return early (treat the element as inherited) when an extension element carries no data, mirroring the existing handling of empty ID lists. The bug was found by fuzzing ieee802_11_parse_elems_full() under KASAN.

Announced Source revision 1
Original source ↗

CVE-2026-68402

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-68402

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "f7dacfb11475ba777e1e84ccec2e14b0ba5a17a3",
        "lessThan": "521dd5fe6d12b0d3c275f919738dc3a07117f4a5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f7dacfb11475ba777e1e84ccec2e14b0ba5a17a3",
        "lessThan": "24154c172246ae3f0e69bb17c9111095685ceedc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f7dacfb11475ba777e1e84ccec2e14b0ba5a17a3",
        "lessThan": "2d31ebb26a14f103c9cdc5287fb20cb2d4bde901",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f7dacfb11475ba777e1e84ccec2e14b0ba5a17a3",
        "lessThan": "20c308d9a57722801961f816395bf825f7bde6bc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f7dacfb11475ba777e1e84ccec2e14b0ba5a17a3",
        "lessThan": "84bd907361c56fbd5523eceb2682cb39da059bd5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f7dacfb11475ba777e1e84ccec2e14b0ba5a17a3",
        "lessThan": "11ac7a5e75f5132f1778e0c60981d30dc29fb869",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f7dacfb11475ba777e1e84ccec2e14b0ba5a17a3",
        "lessThan": "ddf2773bcc8e49a43c561f22ec1e7924215d7947",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f7dacfb11475ba777e1e84ccec2e14b0ba5a17a3",
        "lessThan": "cb8afea4655ff004fa7feee825d5c79783525383",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/wireless/scan.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.2"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.2",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.265",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.216",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.183",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.148",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.101",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.42",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.6",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/wireless/scan.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-68402

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#41718 · Revision 1
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Publisher date
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