CVE-2022-49934 (GCVE-0-2022-49934)

Vulnerability from cvelistv5 – Published: 2025-06-18 10:54 – Updated: 2026-05-11 19:09
VLAI?
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 ?
No CVSS data available.
Assigner
References
Impacted 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)
Create a notification for this product.
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)
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()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:09:31.367Z",
        "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": "2026-05-11T19:09:31.367Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2022-49934",
      "date": "2026-05-19",
      "epss": "0.00064",
      "percentile": "0.19878"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49934\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T11:15:19.400\",\"lastModified\":\"2025-11-14T20:24:12.867\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"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().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: mac80211: Se ha corregido el UAF en ieee80211_scan_rx(). ieee80211_scan_rx() intenta acceder a scan_req-\u0026gt;flags tras una comprobaci\u00f3n nula, pero se observa un UAF al finalizar el escaneo y se ejecuta __ieee80211_scan_completed(), que a su vez llama a cfg80211_scan_done(), lo que libera scan_req. Dado que scan_req est\u00e1 desreferenciado mediante rcu_dereference(), se debe evitar la aceleraci\u00f3n en __ieee80211_scan_completed() asegur\u00e1ndose de que, desde el punto de vista de mac80211, ya no se acceda a \u00e9l desde una secci\u00f3n cr\u00edtica de lectura de RCU antes de llamar a cfg80211_scan_done().\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.19\",\"versionEndExcluding\":\"4.9.330\",\"matchCriteriaId\":\"2E7D435A-EF3D-42C9-9367-7A1A2E90BBC0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.10\",\"versionEndExcluding\":\"4.14.295\",\"matchCriteriaId\":\"E1EEFD21-64A9-49E5-BE6C-53761F46346C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.15\",\"versionEndExcluding\":\"4.19.260\",\"matchCriteriaId\":\"64E35573-7CA4-4480-9B5B-E71B652A966F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.215\",\"matchCriteriaId\":\"B15615EA-D0B2-4F05-879B-7FF9B900DA1E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.142\",\"matchCriteriaId\":\"D44AD643-5591-432E-BD41-C2C737F54AC0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.66\",\"matchCriteriaId\":\"52AE7E2B-7BE3-4B8A-89CC-AB62434899A3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"5.19.8\",\"matchCriteriaId\":\"7FEC7656-4CE2-424C-8830-EDB160E701C8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.0:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"E8BD11A3-8643-49B6-BADE-5029A0117325\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.0:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"5F0AD220-F6A9-4012-8636-155F1B841FAD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.0:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"A46498B3-78E1-4623-AAE1-94D29A42BE4E\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4abc8c07a065ecf771827bde3c63fbbe4aa0c08b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5d20c6f932f2758078d0454729129c894fe353e7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/60deb9f10eec5c6a20252ed36238b55d8b614a2c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6eb181a64fdabf10be9e54de728876667da20255\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/78a07732fbb0934d14827d8f09b9aa6a49ee1aa9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9ad48cbf8b07f10c1e4a7a262b32a9179ae9dd2d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c0445feb80a4d0854898118fa01073701f8d356b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e0ff39448cea654843744c72c6780293c5082cb1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.