Vulnerability-Lookup

GHSA-W75G-VP3J-WH29

Vulnerability from github – Published: 2025-06-18 12:30 – Updated: 2025-11-14 21:30

Details

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

wifi: mac80211: Fix UAF in ieee80211_scan_rx()

ieee80211_scan_rx() tries to access scan_req->flags after a null check, but a UAF is observed when the scan is completed and __ieee80211_scan_completed() executes, which then calls cfg80211_scan_done() leading to the freeing of scan_req.

Since scan_req is rcu_dereference()'d, prevent the racing in __ieee80211_scan_completed() by ensuring that from mac80211's POV it is no longer accessed from an RCU read critical section before we call cfg80211_scan_done().

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-2022-49934"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T11:15:19Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: Fix UAF in ieee80211_scan_rx()\n\nieee80211_scan_rx() tries to access scan_req-\u003eflags after a\nnull check, but a UAF is observed when the scan is completed\nand __ieee80211_scan_completed() executes, which then calls\ncfg80211_scan_done() leading to the freeing of scan_req.\n\nSince scan_req is rcu_dereference()\u0027d, prevent the racing in\n__ieee80211_scan_completed() by ensuring that from mac80211\u0027s\nPOV it is no longer accessed from an RCU read critical section\nbefore we call cfg80211_scan_done().",
  "id": "GHSA-w75g-vp3j-wh29",
  "modified": "2025-11-14T21:30:27Z",
  "published": "2025-06-18T12:30:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49934"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4abc8c07a065ecf771827bde3c63fbbe4aa0c08b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5d20c6f932f2758078d0454729129c894fe353e7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/60deb9f10eec5c6a20252ed36238b55d8b614a2c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6eb181a64fdabf10be9e54de728876667da20255"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/78a07732fbb0934d14827d8f09b9aa6a49ee1aa9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9ad48cbf8b07f10c1e4a7a262b32a9179ae9dd2d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c0445feb80a4d0854898118fa01073701f8d356b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e0ff39448cea654843744c72c6780293c5082cb1"
    }
  ],
  "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-2022-49934 (GCVE-0-2022-49934)

Vulnerability from cvelistv5 – Published: 2025-06-18 10:54 – Updated: 2026-08-05 08:56

Title

wifi: mac80211: Fix UAF in ieee80211_scan_rx()

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: Fix UAF in ieee80211_scan_rx() ieee80211_scan_rx() tries to access scan_req->flags after a null check, but a UAF is observed when the scan is completed and __ieee80211_scan_completed() executes, which then calls cfg80211_scan_done() leading to the freeing of scan_req. Since scan_req is rcu_dereference()'d, prevent the racing in __ieee80211_scan_completed() by ensuring that from mac80211's POV it is no longer accessed from an RCU read critical section before we call cfg80211_scan_done().

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

References

8 references

URL	Tags
https://git.kernel.org/stable/c/6eb181a64fdabf10b…
https://git.kernel.org/stable/c/e0ff39448cea65484…
https://git.kernel.org/stable/c/78a07732fbb0934d1…
https://git.kernel.org/stable/c/9ad48cbf8b07f10c1…
https://git.kernel.org/stable/c/4abc8c07a065ecf77…
https://git.kernel.org/stable/c/5d20c6f932f275807…
https://git.kernel.org/stable/c/c0445feb80a4d0854…
https://git.kernel.org/stable/c/60deb9f10eec5c6a2…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 6ea0a69ca21bbddab5b3979c2190013b0263e749 , < 6eb181a64fdabf10be9e54de728876667da20255 (git) Affected: 6ea0a69ca21bbddab5b3979c2190013b0263e749 , < e0ff39448cea654843744c72c6780293c5082cb1 (git) Affected: 6ea0a69ca21bbddab5b3979c2190013b0263e749 , < 78a07732fbb0934d14827d8f09b9aa6a49ee1aa9 (git) Affected: 6ea0a69ca21bbddab5b3979c2190013b0263e749 , < 9ad48cbf8b07f10c1e4a7a262b32a9179ae9dd2d (git) Affected: 6ea0a69ca21bbddab5b3979c2190013b0263e749 , < 4abc8c07a065ecf771827bde3c63fbbe4aa0c08b (git) Affected: 6ea0a69ca21bbddab5b3979c2190013b0263e749 , < 5d20c6f932f2758078d0454729129c894fe353e7 (git) Affected: 6ea0a69ca21bbddab5b3979c2190013b0263e749 , < c0445feb80a4d0854898118fa01073701f8d356b (git) Affected: 6ea0a69ca21bbddab5b3979c2190013b0263e749 , < 60deb9f10eec5c6a20252ed36238b55d8b614a2c (git)
Linux	Linux	Affected: 3.19 Unaffected: 0 , < 3.19 (semver) Unaffected: 4.9.330 , ≤ 4.9.* (semver) Unaffected: 4.14.295 , ≤ 4.14.* (semver) Unaffected: 4.19.260 , ≤ 4.19.* (semver) Unaffected: 5.4.215 , ≤ 5.4.* (semver) Unaffected: 5.10.142 , ≤ 5.10.* (semver) Unaffected: 5.15.66 , ≤ 5.15.* (semver) Unaffected: 5.19.8 , ≤ 5.19.* (semver) Unaffected: 6.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/scan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6eb181a64fdabf10be9e54de728876667da20255",
              "status": "affected",
              "version": "6ea0a69ca21bbddab5b3979c2190013b0263e749",
              "versionType": "git"
            },
            {
              "lessThan": "e0ff39448cea654843744c72c6780293c5082cb1",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "78a07732fbb0934d14827d8f09b9aa6a49ee1aa9",
              "status": "affected",
              "version": "6ea0a69ca21bbddab5b3979c2190013b0263e749",
              "versionType": "git"
            },
            {
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              "status": "affected",
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            {
              "lessThan": "4abc8c07a065ecf771827bde3c63fbbe4aa0c08b",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "5d20c6f932f2758078d0454729129c894fe353e7",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "c0445feb80a4d0854898118fa01073701f8d356b",
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              "versionType": "git"
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            }
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          ],
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.19"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.330",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.295",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.260",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.215",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.142",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.66",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                {
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                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: Fix UAF in ieee80211_scan_rx()\n\nieee80211_scan_rx() tries to access scan_req-\u003eflags after a\nnull check, but a UAF is observed when the scan is completed\nand __ieee80211_scan_completed() executes, which then calls\ncfg80211_scan_done() leading to the freeing of scan_req.\n\nSince scan_req is rcu_dereference()\u0027d, prevent the racing in\n__ieee80211_scan_completed() by ensuring that from mac80211\u0027s\nPOV it is no longer accessed from an RCU read critical section\nbefore we call cfg80211_scan_done()."
        }
      ],
      "metrics": [
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          "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"
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          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - The UAF is hit in ieee80211_scan_rx() on the softirq RX path when processing over-the-air Probe Response frames during an active scan; an attacker on the same Wi\u2011Fi RF segment injects those frames.\nAC:L - The attacker controls the RX side by flooding Probe Responses and can retry across frequent automatic scans (observable via the victim\u2019s Probe Requests), making this an attacker-influenced race rather than an uncontrollable condition.\nPR:N - Frame delivery and scan RX handling require no account or capability on the victim; background/connect/scheduled scans run from system WLAN stacks without attacker-held host privileges.\nUI:N - Phones and laptops routinely scan in the background with Wi\u2011Fi enabled, so Probe Responses are processed at scan completion without further victim action at attack time.\nS:U - The use-after-free corrupts mac80211/cfg80211 heap state inside the host kernel only and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - After kfree(scan_req), ieee80211_scan_rx() still reads scan_req-\u003eflags via a dangling RCU reference; reclaiming that cfg80211_scan_request object enables arbitrary kernel disclosure.\nI:H - The same sprayable scan_req UAF in the concurrent RX path yields write and control-flow primitives characteristic of exploitable kernel use-after-frees.\nA:H - Concurrent use of the freed scan_req causes a KASAN-confirmed kernel oops/panic-class crash in the scan RX path, so availability impact is complete even without full code execution."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:56:46.037Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6eb181a64fdabf10be9e54de728876667da20255"
        },
        {
          "url": "https://git.kernel.org/stable/c/e0ff39448cea654843744c72c6780293c5082cb1"
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          "url": "https://git.kernel.org/stable/c/78a07732fbb0934d14827d8f09b9aa6a49ee1aa9"
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          "url": "https://git.kernel.org/stable/c/4abc8c07a065ecf771827bde3c63fbbe4aa0c08b"
        },
        {
          "url": "https://git.kernel.org/stable/c/5d20c6f932f2758078d0454729129c894fe353e7"
        },
        {
          "url": "https://git.kernel.org/stable/c/c0445feb80a4d0854898118fa01073701f8d356b"
        },
        {
          "url": "https://git.kernel.org/stable/c/60deb9f10eec5c6a20252ed36238b55d8b614a2c"
        }
      ],
      "title": "wifi: mac80211: Fix UAF in ieee80211_scan_rx()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49934",
    "datePublished": "2025-06-18T10:54:36.161Z",
    "dateReserved": "2025-05-01T14:05:17.254Z",
    "dateUpdated": "2026-08-05T08:56:46.037Z",
    "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.

Detection rules are retrieved from Rulezet.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

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