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CVE-2022-49942 (GCVE-0-2022-49942)

Vulnerability from cvelistv5 – Published: 2025-06-18 10:59 – Updated: 2026-05-11 19:09
VLAI
Title
wifi: mac80211: Don't finalize CSA in IBSS mode if state is disconnected
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: Don't finalize CSA in IBSS mode if state is disconnected When we are not connected to a channel, sending channel "switch" announcement doesn't make any sense. The BSS list is empty in that case. This causes the for loop in cfg80211_get_bss() to be bypassed, so the function returns NULL (check line 1424 of net/wireless/scan.c), causing the WARN_ON() in ieee80211_ibss_csa_beacon() to get triggered (check line 500 of net/mac80211/ibss.c), which was consequently reported on the syzkaller dashboard. Thus, check if we have an existing connection before generating the CSA beacon in ieee80211_ibss_finish_csa().
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: cd7760e62c2ac8581f050b2d36501d1a60beaf83 , < cdb9a8da9b84800eb15506cd9363cf0cf059e677 (git)
Affected: cd7760e62c2ac8581f050b2d36501d1a60beaf83 , < 1691a48aef0a82d1754b9853dae7e3f5cacdf70b (git)
Affected: cd7760e62c2ac8581f050b2d36501d1a60beaf83 , < d9eb37db6a28b59a95a3461450ee209654c5f95b (git)
Affected: cd7760e62c2ac8581f050b2d36501d1a60beaf83 , < 66689c5c02acd4d76c28498fe220998610aec61e (git)
Affected: cd7760e62c2ac8581f050b2d36501d1a60beaf83 , < dd649b49219a0388cc10fc40e4c2ea681566a780 (git)
Affected: cd7760e62c2ac8581f050b2d36501d1a60beaf83 , < 552ba102a6898630a7d16887f29e606d6fabe508 (git)
Affected: cd7760e62c2ac8581f050b2d36501d1a60beaf83 , < 864e280cb3a9a0f5212b16ef5057c4e692f7039d (git)
Affected: cd7760e62c2ac8581f050b2d36501d1a60beaf83 , < 15bc8966b6d3a5b9bfe4c9facfa02f2b69b1e5f0 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.13
Unaffected: 0 , < 3.13 (semver)
Unaffected: 4.9.328 , ≤ 4.9.* (semver)
Unaffected: 4.14.293 , ≤ 4.14.* (semver)
Unaffected: 4.19.258 , ≤ 4.19.* (semver)
Unaffected: 5.4.213 , ≤ 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)
guessed Create a notification for this product.
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            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: mac80211: No finalizar la CSA en modo IBSS si el estado es desconectado. Cuando no estamos conectados a un canal, enviar el anuncio de cambio de canal no tiene sentido. En ese caso, la lista BSS est\u00e1 vac\u00eda. Esto provoca que se omita el bucle for en cfg80211_get_bss(), por lo que la funci\u00f3n devuelve NULL (consulte la l\u00ednea 1424 de net/wireless/scan.c), lo que provoca la activaci\u00f3n de WARN_ON() en ieee80211_ibss_csa_beacon() (consulte la l\u00ednea 500 de net/mac80211/ibss.c), lo que se inform\u00f3 en el panel de control de syzkaller. Por lo tanto, se debe comprobar si existe una conexi\u00f3n antes de generar la baliza CSA en ieee80211_ibss_finish_csa()."
          }
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        "id": "CVE-2022-49942",
        "lastModified": "2026-06-17T05:19:35.127",
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                "confidentialityImpact": "NONE",
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            "url": "https://git.kernel.org/stable/c/1691a48aef0a82d1754b9853dae7e3f5cacdf70b"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/552ba102a6898630a7d16887f29e606d6fabe508"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/66689c5c02acd4d76c28498fe220998610aec61e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/864e280cb3a9a0f5212b16ef5057c4e692f7039d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/cdb9a8da9b84800eb15506cd9363cf0cf059e677"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/d9eb37db6a28b59a95a3461450ee209654c5f95b"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/dd649b49219a0388cc10fc40e4c2ea681566a780"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-476"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:33:26+00:00",
      "cve": "CVE-2022-49942",
      "id": "CVE-2022-49942",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "321",
      "product_status:known_affected": "52",
      "product_status:known_not_affected": "104",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: mac80211: Don\u0027t finalize CSA in IBSS mode if state is disconnected",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49942.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T01:27:54Z",
      "cve": "CVE-2022-49942",
      "id": "CVE-2022-49942",
      "initial_release_date": "2025-06-19T03:45:58Z",
      "product_status:known_affected": "491",
      "product_status:known_not_affected": "192",
      "product_status:recommended": "320",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49942",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49942.json",
      "version": "62"
    }
  }
}



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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.


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.