CVE-2022-49942

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This causes the for loop in\ncfg80211_get_bss() to be bypassed, so the function returns NULL\n(check line 1424 of net/wireless/scan.c), causing the WARN_ON()\nin ieee80211_ibss_csa_beacon() to get triggered (check line 500\nof net/mac80211/ibss.c), which was consequently reported on the\nsyzkaller dashboard.\n\nThus, check if we have an existing connection before generating\nthe CSA beacon in ieee80211_ibss_finish_csa()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/mac80211/ibss.c"], "versions": [{"version": "cd7760e62c2ac8581f050b2d36501d1a60beaf83", "lessThan": "cdb9a8da9b84800eb15506cd9363cf0cf059e677", "status": "affected", "versionType": "git"}, {"version": "cd7760e62c2ac8581f050b2d36501d1a60beaf83", "lessThan": "1691a48aef0a82d1754b9853dae7e3f5cacdf70b", "status": "affected", "versionType": "git"}, {"version": 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{}

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doesn't make any sense.\n\nThe BSS list is empty in that case. This causes the for loop in\ncfg80211_get_bss() to be bypassed, so the function returns NULL\n(check line 1424 of net/wireless/scan.c), causing the WARN_ON()\nin ieee80211_ibss_csa_beacon() to get triggered (check line 500\nof net/mac80211/ibss.c), which was consequently reported on the\nsyzkaller dashboard.\n\nThus, check if we have an existing connection before generating\nthe CSA beacon in ieee80211_ibss_finish_csa()."}, {"lang": "es", "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()."}], "id": "CVE-2022-49942", "lastModified": "2026-06-17T05:19:35.127", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-06-18T11:15:21.147", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/15bc8966b6d3a5b9bfe4c9facfa02f2b69b1e5f0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "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"}]}

{"bugzilla": {"description": "kernel: wifi: mac80211: Don't finalize CSA in IBSS mode if state is disconnected", "id": "2373421", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2373421"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nwifi: mac80211: Don't finalize CSA in IBSS mode if state is disconnected\nWhen we are not connected to a channel, sending channel \"switch\"\nannouncement doesn't make any sense.\nThe BSS list is empty in that case. This causes the for loop in\ncfg80211_get_bss() to be bypassed, so the function returns NULL\n(check line 1424 of net/wireless/scan.c), causing the WARN_ON()\nin ieee80211_ibss_csa_beacon() to get triggered (check line 500\nof net/mac80211/ibss.c), which was consequently reported on the\nsyzkaller dashboard.\nThus, check if we have an existing connection before generating\nthe CSA beacon in ieee80211_ibss_finish_csa()."], "name": "CVE-2022-49942", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Under investigation", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-06-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49942\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49942\nhttps://lore.kernel.org/linux-cve-announce/2025061807-CVE-2022-49942-8f93@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-06-23T08:20:14.536148+00:00", "updated": "2025-06-23T08:20:14.536191+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}