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GHSA-G43X-JRQR-J62R

Vulnerability from github – Published: 2026-03-18 12:31 – Updated: 2026-04-02 15:31

Details

In the Linux kernel, the following vulnerability has been resolved:

wifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration

link_id is taken from the ML Reconfiguration element (control & 0x000f), so it can be 0..15. link_removal_timeout[] has IEEE80211_MLD_MAX_NUM_LINKS (15) elements, so index 15 is out-of-bounds. Skip subelements with link_id >= IEEE80211_MLD_MAX_NUM_LINKS to avoid a stack out-of-bounds write.

Severity

8.8 (High)


                  
                    CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23246"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-18T11:16:16Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration\n\nlink_id is taken from the ML Reconfiguration element (control \u0026 0x000f),\nso it can be 0..15. link_removal_timeout[] has IEEE80211_MLD_MAX_NUM_LINKS\n(15) elements, so index 15 is out-of-bounds. Skip subelements with\nlink_id \u003e= IEEE80211_MLD_MAX_NUM_LINKS to avoid a stack out-of-bounds\nwrite.",
  "id": "GHSA-g43x-jrqr-j62r",
  "modified": "2026-04-02T15:31:36Z",
  "published": "2026-03-18T12:31:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23246"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/162d331d833dc73a3e905a24c44dd33732af1fc5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/650981e718e68005ca2760a6358134b8a98ebea4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bfde158d5d1322c0c2df398a8d1ccce04943be2e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d58d71c2167601762351962b9604808d3be94400"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f35ceec54d48e227fa46f8f97fd100a77b8eab15"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-23246 (GCVE-0-2026-23246)

Vulnerability from cvelistv5 – Published: 2026-03-18 10:05 – Updated: 2026-08-05 12:20

Title

wifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration link_id is taken from the ML Reconfiguration element (control & 0x000f), so it can be 0..15. link_removal_timeout[] has IEEE80211_MLD_MAX_NUM_LINKS (15) elements, so index 15 is out-of-bounds. Skip subelements with link_id >= IEEE80211_MLD_MAX_NUM_LINKS to avoid a stack out-of-bounds write.

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root Scorecard

References

5 references

URL	Tags
https://git.kernel.org/stable/c/650981e718e68005c…
https://git.kernel.org/stable/c/bfde158d5d1322c0c…
https://git.kernel.org/stable/c/f35ceec54d48e227f…
https://git.kernel.org/stable/c/d58d71c2167601762…
https://git.kernel.org/stable/c/162d331d833dc73a3…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c , < 650981e718e68005ca2760a6358134b8a98ebea4 (git) Affected: 8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c , < bfde158d5d1322c0c2df398a8d1ccce04943be2e (git) Affected: 8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c , < f35ceec54d48e227fa46f8f97fd100a77b8eab15 (git) Affected: 8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c , < d58d71c2167601762351962b9604808d3be94400 (git) Affected: 8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c , < 162d331d833dc73a3e905a24c44dd33732af1fc5 (git)
Linux	Linux	Affected: 6.5 Unaffected: 0 , < 6.5 (semver) Unaffected: 6.6.130 , ≤ 6.6.* (semver) Unaffected: 6.12.77 , ≤ 6.12.* (semver) Unaffected: 6.18.17 , ≤ 6.18.* (semver) Unaffected: 6.19.7 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/mlme.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "650981e718e68005ca2760a6358134b8a98ebea4",
              "status": "affected",
              "version": "8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c",
              "versionType": "git"
            },
            {
              "lessThan": "bfde158d5d1322c0c2df398a8d1ccce04943be2e",
              "status": "affected",
              "version": "8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c",
              "versionType": "git"
            },
            {
              "lessThan": "f35ceec54d48e227fa46f8f97fd100a77b8eab15",
              "status": "affected",
              "version": "8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c",
              "versionType": "git"
            },
            {
              "lessThan": "d58d71c2167601762351962b9604808d3be94400",
              "status": "affected",
              "version": "8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c",
              "versionType": "git"
            },
            {
              "lessThan": "162d331d833dc73a3e905a24c44dd33732af1fc5",
              "status": "affected",
              "version": "8eb8dd2ffbbb6b0b8843b66754ee9f129f1b2d6c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/mlme.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.5"
            },
            {
              "lessThan": "6.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.130",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.77",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.17",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.130",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.77",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.17",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.7",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.5",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration\n\nlink_id is taken from the ML Reconfiguration element (control \u0026 0x000f),\nso it can be 0..15. link_removal_timeout[] has IEEE80211_MLD_MAX_NUM_LINKS\n(15) elements, so index 15 is out-of-bounds. Skip subelements with\nlink_id \u003e= IEEE80211_MLD_MAX_NUM_LINKS to avoid a stack out-of-bounds\nwrite."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - The vulnerability is triggered by processing crafted WiFi beacon frames received over the air. The attacker must be within WiFi range of the victim device (adjacent network).\nAC:L - The attacker can reliably trigger this by broadcasting crafted beacon frames with a spoofed BSSID containing a malicious ML Reconfiguration element. No special conditions beyond WiFi proximity are needed once the victim is associated.\nPR:N - No privileges or authentication are required. WiFi beacon frames are unencrypted management frames that any device in range can inject by spoofing the associated AP\u0027s BSSID.\nUI:N - No user interaction is required. The victim device automatically processes beacon frames from its associated AP while connected to a WiFi network.\nS:U - The vulnerability affects the kernel itself; exploitation stays within the same security authority (kernel context). There is no crossing of a virtualization or sandbox boundary.\nC:H - This is a stack-based out-of-bounds write where the attacker controls the written value. Stack corruption can be leveraged to read arbitrary memory through carefully crafted exploitation techniques.\nI:H - The stack-based buffer overflow allows the attacker to write a controlled 2-byte value past the array bounds on the stack, potentially corrupting return addresses or other stack data, which can lead to arbitrary code execution in kernel context.\nA:H - The stack corruption will at minimum cause a kernel crash/oops, resulting in a denial of service. Stack buffer overflows reliably crash the kernel when they corrupt critical stack data."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:20:55.228Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/650981e718e68005ca2760a6358134b8a98ebea4"
        },
        {
          "url": "https://git.kernel.org/stable/c/bfde158d5d1322c0c2df398a8d1ccce04943be2e"
        },
        {
          "url": "https://git.kernel.org/stable/c/f35ceec54d48e227fa46f8f97fd100a77b8eab15"
        },
        {
          "url": "https://git.kernel.org/stable/c/d58d71c2167601762351962b9604808d3be94400"
        },
        {
          "url": "https://git.kernel.org/stable/c/162d331d833dc73a3e905a24c44dd33732af1fc5"
        }
      ],
      "title": "wifi: mac80211: bounds-check link_id in ieee80211_ml_reconfiguration",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23246",
    "datePublished": "2026-03-18T10:05:08.312Z",
    "dateReserved": "2026-01-13T15:37:45.989Z",
    "dateUpdated": "2026-08-05T12:20:55.228Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-G43X-JRQR-J62R

CVE-2026-23246 (GCVE-0-2026-23246)

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