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

Vulnerability from cvelistv5 – Published: 2025-06-18 10:54 – Updated: 2026-08-05 08:56
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
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
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)
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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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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 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T19:42:36+00:00",
      "cve": "CVE-2022-49934",
      "id": "CVE-2022-49934",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "321",
      "product_status:known_affected": "80",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: mac80211: Fix UAF in ieee80211_scan_rx()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49934.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T01:27:59Z",
      "cve": "CVE-2022-49934",
      "id": "CVE-2022-49934",
      "initial_release_date": "2025-06-19T03:46:10Z",
      "product_status:known_affected": "501",
      "product_status:known_not_affected": "187",
      "product_status:recommended": "357",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49934",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49934.json",
      "version": "57"
    }
  }
}



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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.