CVE-2022-50413 (GCVE-0-2022-50413)

Vulnerability from cvelistv5 – Published: 2025-09-18 16:03 – Updated: 2026-08-05 08:58
VLAI
Title
wifi: mac80211: fix use-after-free
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: fix use-after-free We've already freed the assoc_data at this point, so need to use another copy of the AP (MLD) address instead.
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 19:09 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 81151ce462e533551f3284bfdb8e0f461c9220e6 , < aebef10affe16228462af680b88751bf137e2856 (git)
Affected: 81151ce462e533551f3284bfdb8e0f461c9220e6 , < 40fb87129049ec5876dabf4a4d4aed6642b31f1a (git)
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Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.0.3 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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                  "lang": "en",
                  "value": "AV:A - The UAF is reached by processing an over-the-air Association Response in ieee80211_sta_rx_queued_mgmt \u2192 ieee80211_rx_mgmt_assoc_resp during MLO association; an attacker on the same Wi-Fi segment (malicious/evil-twin MLO AP or BSSID-spoofed frame injection) delivers that frame.\nAC:L - Once an MLO association is in progress, a successful AssocResp with a valid multi-link element deterministically frees assoc_data then reuses assoc_data-\u003eap_addr; the adjacent attacker fully controls that response, with no race or attacker-uncontrollable timing required.\nPR:N - The vulnerable path runs in the station RX/MLME soft path on the received AssocResp with no host authentication or capability check; an unauthenticated adjacent Wi-Fi peer needs no account on the victim.\nUI:N - In the worst reasonable case (auto-reconnect/evil twin of a known SSID, or an already-initiated MLO association), the AssocResp is processed automatically without a further victim action at attack time.\nS:U - The use-after-free corrupts mac80211/cfg80211 state inside the host kernel authority only and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - After kfree(assoc_data), resp.ap_mld_addr points into freed heap memory and cfg80211 later memcpy\u0027s ETH_ALEN from it; that UAF enables heap reuse and arbitrary kernel disclosure.\nI:H - The same sprayable ieee80211_mgd_assoc_data UAF while the dangling AP MLD address is consumed into connection/result state yields write and control-flow primitives characteristic of exploitable kernel UAFs.\nA:H - Use of the freed assoc_data object can oops/panic the kernel in the association-response path, so availability impact is complete even without full code execution."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T08:58:41.448Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/aebef10affe16228462af680b88751bf137e2856"
            },
            {
              "url": "https://git.kernel.org/stable/c/40fb87129049ec5876dabf4a4d4aed6642b31f1a"
            }
          ],
          "title": "wifi: mac80211: fix use-after-free",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-50413",
        "datePublished": "2025-09-18T16:03:56.853Z",
        "dateReserved": "2025-09-17T14:53:07.002Z",
        "dateUpdated": "2026-08-05T08:58:41.448Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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

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  • 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.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • 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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.