Vulnerability-Lookup

GHSA-2587-VVWW-5V6H

Vulnerability from github – Published: 2026-10-23 12:31 – Updated: 2026-10-24 15:32

Details

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

wifi: iwlwifi: mvm: fix sched scan IE sizing

Scheduled scan built the probe request before iwl_mvm_scan_fits(), so oversized IEs could be copied into the fixed preq buffer before length validation. Move iwl_mvm_build_scan_probe() after the fits check.

Also advertise max_sched_scan_ie_len using iwl_mvm_max_scan_ie_len() so userspace limits account for driver-inserted DS/TPC bytes.

Severity

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98889"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-23T12:18:22Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: mvm: fix sched scan IE sizing\n\nScheduled scan built the probe request before iwl_mvm_scan_fits(),\nso oversized IEs could be copied into the fixed preq buffer before\nlength validation. Move iwl_mvm_build_scan_probe() after the fits\ncheck.\n\nAlso advertise max_sched_scan_ie_len using iwl_mvm_max_scan_ie_len()\nso userspace limits account for driver-inserted DS/TPC bytes.",
  "id": "GHSA-2587-vvww-5v6h",
  "modified": "2026-10-24T15:32:47Z",
  "published": "2026-10-23T12:31:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98889"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/05f79cea3b15cfe600b205ddcfd51ebee15d908a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0a63f98e5163a2ec2822dfb691ee5a6094de08ec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/358eca9a898ad4cce7453e9dcfd005d019a2b01f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f155d262b31b9b17e0f9856bdabe0968eb4930f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a24417478f90e9f1a4ea24cd4b784afccb56fbae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f2268060e99f94314b9988dfa17393c2694fa9b2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-98889 (GCVE-0-2026-98889)

Vulnerability from cvelistv5 – Published: 2026-10-23 11:37 – Updated: 2026-10-24 14:09

Title

wifi: iwlwifi: mvm: fix sched scan IE sizing

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: mvm: fix sched scan IE sizing Scheduled scan built the probe request before iwl_mvm_scan_fits(), so oversized IEs could be copied into the fixed preq buffer before length validation. Move iwl_mvm_build_scan_probe() after the fits check. Also advertise max_sched_scan_ie_len using iwl_mvm_max_scan_ie_len() so userspace limits account for driver-inserted DS/TPC bytes.

Severity

7.8 (High)


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

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7056 records in the last 180 days details

References

6 references

URL	Tags
https://git.kernel.org/stable/c/f2268060e99f94314…
https://git.kernel.org/stable/c/358eca9a898ad4cce…
https://git.kernel.org/stable/c/05f79cea3b15cfe60…
https://git.kernel.org/stable/c/a24417478f90e9f1a…
https://git.kernel.org/stable/c/0a63f98e5163a2ec2…
https://git.kernel.org/stable/c/4f155d262b31b9b17…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f2268060e99f94314b9988dfa17393c2694fa9b2 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 358eca9a898ad4cce7453e9dcfd005d019a2b01f (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 05f79cea3b15cfe600b205ddcfd51ebee15d908a (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a24417478f90e9f1a4ea24cd4b784afccb56fbae (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0a63f98e5163a2ec2822dfb691ee5a6094de08ec (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4f155d262b31b9b17e0f9856bdabe0968eb4930f (git) Affected: 0 , < 5.15.222 (semver) Affected: 0 , < 6.1.189 (semver) Affected: 0 , < 6.6.158 (semver) Affected: 0 , < 6.12.111 (semver) Affected: 0 , < 6.18.53 (semver)
Linux	Linux	Unaffected: 5.15.222 , ≤ 5.15.* (semver) Unaffected: 6.1.189 , ≤ 6.1.* (semver) Unaffected: 6.6.158 , ≤ 6.6.* (semver) Unaffected: 6.12.111 , ≤ 6.12.* (semver) Unaffected: 6.18.53 , ≤ 6.18.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c",
            "drivers/net/wireless/intel/iwlwifi/mvm/scan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f2268060e99f94314b9988dfa17393c2694fa9b2",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "358eca9a898ad4cce7453e9dcfd005d019a2b01f",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "05f79cea3b15cfe600b205ddcfd51ebee15d908a",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "a24417478f90e9f1a4ea24cd4b784afccb56fbae",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "0a63f98e5163a2ec2822dfb691ee5a6094de08ec",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "4f155d262b31b9b17e0f9856bdabe0968eb4930f",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "5.15.222",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.189",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.158",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.111",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "6.18.53",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c",
            "drivers/net/wireless/intel/iwlwifi/mvm/scan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.222",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.189",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.158",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
                {
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                  "versionEndExcluding": "6.18.53",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: mvm: fix sched scan IE sizing\n\nScheduled scan built the probe request before iwl_mvm_scan_fits(),\nso oversized IEs could be copied into the fixed preq buffer before\nlength validation. Move iwl_mvm_build_scan_probe() after the fits\ncheck.\n\nAlso advertise max_sched_scan_ie_len using iwl_mvm_max_scan_ie_len()\nso userspace limits account for driver-inserted DS/TPC bytes."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - Attacker-controlled bytes enter through NL80211_CMD_START_SCHED_SCAN\u0027s NL80211_ATTR_IE, then traverse ieee80211_request_sched_scan_start() to patched iwl_mvm_sched_scan_start() and iwl_mvm_build_scan_probe(); they are not received WiFi frames.\nAC:L - A valid IE stream near the advertised 486-byte limit deterministically overflows because ieee80211_build_preq_ies() adds and can duplicate data per band, while vulnerable iwl_mvm_sched_scan_start() calls iwl_mvm_build_scan_probe() before iwl_mvm_scan_fits(); no race is required.\nPR:L - NL80211_CMD_START_SCHED_SCAN uses GENL_UNS_ADMIN_PERM, which checks CAP_NET_ADMIN in the network namespace\u0027s owning user namespace; mac80211 sets WIPHY_FLAG_NETNS_OK, so a wiphy delegated to a user/net namespace is reachable without init-namespace root.\nUI:N - The attacker directly submits the scheduled-scan netlink request against an up, idle interface; no separate victim action is required.\nS:U - The overflow corrupts the host kernel stack inside iwl_mvm_sched_scan_start() and does not cross a VM, IOMMU, or other distinct security authority.\nC:H - The copies can run beyond params.preq.buf through adjacent pointers and beyond the local params object; this attacker-influenced stack corruption can be leveraged for control-flow execution and consequent disclosure of arbitrary kernel memory.\nI:H - iwl_mvm_build_scan_probe() copies attacker-supplied IEs plus per-band generated data into the fixed 512-byte preq.buf without first enforcing iwl_mvm_scan_fits(), producing an attacker-shaped out-of-bounds stack write capable of control-flow hijacking.\nA:H - The overwrite can extend beyond struct iwl_mvm_scan_params into stack control state; stack-protector detection or corrupted return state can oops or panic the kernel."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-24T14:09:27.923Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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        {
          "url": "https://git.kernel.org/stable/c/a24417478f90e9f1a4ea24cd4b784afccb56fbae"
        },
        {
          "url": "https://git.kernel.org/stable/c/0a63f98e5163a2ec2822dfb691ee5a6094de08ec"
        },
        {
          "url": "https://git.kernel.org/stable/c/4f155d262b31b9b17e0f9856bdabe0968eb4930f"
        }
      ],
      "title": "wifi: iwlwifi: mvm: fix sched scan IE sizing",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98889",
    "datePublished": "2026-10-23T11:37:49.469Z",
    "dateReserved": "2026-09-25T10:25:14.378Z",
    "dateUpdated": "2026-10-24T14:09:27.923Z",
    "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.

Vulnerability timeline

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