CVE-2022-49934 (GCVE-0-2022-49934)
Vulnerability from cvelistv5
Published
2025-06-18 10:54
Modified
2026-08-05 08:56
Severity ?
8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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().
References
Impacted products
Vendor Product Version
Linux Linux Version: 6ea0a69ca21bbddab5b3979c2190013b0263e749
Version: 6ea0a69ca21bbddab5b3979c2190013b0263e749
Version: 6ea0a69ca21bbddab5b3979c2190013b0263e749
Version: 6ea0a69ca21bbddab5b3979c2190013b0263e749
Version: 6ea0a69ca21bbddab5b3979c2190013b0263e749
Version: 6ea0a69ca21bbddab5b3979c2190013b0263e749
Version: 6ea0a69ca21bbddab5b3979c2190013b0263e749
Version: 6ea0a69ca21bbddab5b3979c2190013b0263e749
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "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",
              "version": "6ea0a69ca21bbddab5b3979c2190013b0263e749",
              "versionType": "git"
            },
            {
              "lessThan": "78a07732fbb0934d14827d8f09b9aa6a49ee1aa9",
              "status": "affected",
              "version": "6ea0a69ca21bbddab5b3979c2190013b0263e749",
              "versionType": "git"
            },
            {
              "lessThan": "9ad48cbf8b07f10c1e4a7a262b32a9179ae9dd2d",
              "status": "affected",
              "version": "6ea0a69ca21bbddab5b3979c2190013b0263e749",
              "versionType": "git"
            },
            {
              "lessThan": "4abc8c07a065ecf771827bde3c63fbbe4aa0c08b",
              "status": "affected",
              "version": "6ea0a69ca21bbddab5b3979c2190013b0263e749",
              "versionType": "git"
            },
            {
              "lessThan": "5d20c6f932f2758078d0454729129c894fe353e7",
              "status": "affected",
              "version": "6ea0a69ca21bbddab5b3979c2190013b0263e749",
              "versionType": "git"
            },
            {
              "lessThan": "c0445feb80a4d0854898118fa01073701f8d356b",
              "status": "affected",
              "version": "6ea0a69ca21bbddab5b3979c2190013b0263e749",
              "versionType": "git"
            },
            {
              "lessThan": "60deb9f10eec5c6a20252ed36238b55d8b614a2c",
              "status": "affected",
              "version": "6ea0a69ca21bbddab5b3979c2190013b0263e749",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/scan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.19"
            },
            {
              "lessThan": "3.19",
              "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:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.330",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.295",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.260",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.215",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.142",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.66",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19.8",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0",
                  "versionStartIncluding": "3.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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": [
        {
          "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 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"
        },
        {
          "url": "https://git.kernel.org/stable/c/78a07732fbb0934d14827d8f09b9aa6a49ee1aa9"
        },
        {
          "url": "https://git.kernel.org/stable/c/9ad48cbf8b07f10c1e4a7a262b32a9179ae9dd2d"
        },
        {
          "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"
      }
    }
  },
  "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"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.