CVE-2022-49305

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...\n\nWe hold ieee->beacon_lock in position (1) of thread 1 and use\ndel_timer_sync() to wait timer to stop, but timer handler\nalso need ieee->beacon_lock in position (2) of thread 2.\nAs a result, ieee80211_beacons_stop() will block forever.\n\nThis patch extracts del_timer_sync() from the protection of\nspin_lock_irqsave(), which could let timer handler to obtain\nthe needed lock."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c"], "versions": [{"version": "8fc8598e61f6f384f3eaf1d9b09500c12af47b37", "lessThan": "b465bb2ebf666116c1ac745cb80c65154dc0d27e", "status": "affected", "versionType": "git"}, {"version": "8fc8598e61f6f384f3eaf1d9b09500c12af47b37", "lessThan": "1fbe033c52480f7954c057510040fa6286c4ea25", "status": "affected", "versionType": "git"}, {"version": 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{"title": "drivers: staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop()", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "8fc8598e61f6f384f3eaf1d9b09500c12af47b37", "lessThan": "b465bb2ebf666116c1ac745cb80c65154dc0d27e", "versionType": "git"}, {"status": "affected", "version": "8fc8598e61f6f384f3eaf1d9b09500c12af47b37", "lessThan": "1fbe033c52480f7954c057510040fa6286c4ea25", "versionType": "git"}, {"status": "affected", "version": "8fc8598e61f6f384f3eaf1d9b09500c12af47b37", "lessThan": "66f769762f65d957f688f3258755c6ec410bf710", "versionType": "git"}, {"status": "affected", "version": "8fc8598e61f6f384f3eaf1d9b09500c12af47b37", "lessThan": "042915c1bfedd684c1d98a841794ee203200571a", "versionType": "git"}, {"status": "affected", "version": "8fc8598e61f6f384f3eaf1d9b09500c12af47b37", "lessThan": "ffc9cab7243f8151be37966301307bfd3cda2db3", "versionType": 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the protection of\nspin_lock_irqsave(), which could let timer handler to obtain\nthe needed lock."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.19.247", "versionStartIncluding": "2.6.33"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.198", "versionStartIncluding": "2.6.33"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.122", "versionStartIncluding": "2.6.33"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.47", "versionStartIncluding": "2.6.33"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.17.15", "versionStartIncluding": "2.6.33"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": 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staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop()\n\nThere is a deadlock in ieee80211_beacons_stop(), which is shown below:\n\n (Thread 1) | (Thread 2)\n | ieee80211_send_beacon()\nieee80211_beacons_stop() | mod_timer()\n spin_lock_irqsave() //(1) | (wait a time)\n ... | ieee80211_send_beacon_cb()\n del_timer_sync() | spin_lock_irqsave() //(2)\n (wait timer to stop) | ...\n\nWe hold ieee->beacon_lock in position (1) of thread 1 and use\ndel_timer_sync() to wait timer to stop, but timer handler\nalso need ieee->beacon_lock in position (2) of thread 2.\nAs a result, ieee80211_beacons_stop() will block forever.\n\nThis patch extracts del_timer_sync() from the protection of\nspin_lock_irqsave(), which could let timer handler to obtain\nthe needed lock."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drivers: staging: rtl8192u: Corregir bloqueo en ieee80211_beacons_stop() Hay un bloqueo en ieee80211_beacons_stop(), que se muestra a continuaci\u00f3n: (Hilo 1) | (Hilo 2) | ieee80211_send_beacon() ieee80211_beacons_stop() | mod_timer() spin_lock_irqsave() //(1) | (esperar un tiempo) ... | ieee80211_send_beacon_cb() del_timer_sync() | spin_lock_irqsave() //(2) (esperar a que el temporizador se detenga) | ... Mantenemos ieee->beacon_lock en la posici\u00f3n (1) del hilo 1 y usamos del_timer_sync() para esperar a que el temporizador se detenga, pero el controlador del temporizador tambi\u00e9n necesita ieee->beacon_lock en la posici\u00f3n (2) del hilo 2. Como resultado, ieee80211_beacons_stop() se bloquear\u00e1 para siempre. Este parche extrae del_timer_sync() de la protecci\u00f3n de spin_lock_irqsave(), lo que podr\u00eda permitir que el controlador del temporizador obtenga el bloqueo necesario."}], "id": "CVE-2022-49305", "lastModified": "2026-06-17T05:17:39.737", "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"}, {"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-49305", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T19:44:29.816182Z", "version": "2.0.3"}}]}, "published": "2025-02-26T07:01:07.310", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/042915c1bfedd684c1d98a841794ee203200571a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1fbe033c52480f7954c057510040fa6286c4ea25"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/66f769762f65d957f688f3258755c6ec410bf710"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/806c7b53414934ba2a39449b31fd1a038e500273"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b34cb54923a6e5ddefbaf358c85c922c6ab456e2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b465bb2ebf666116c1ac745cb80c65154dc0d27e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ffc9cab7243f8151be37966301307bfd3cda2db3"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-667"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: drivers: staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop()", "id": "2347668", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2347668"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-667", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrivers: staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop()\nThere is a deadlock in ieee80211_beacons_stop(), which is shown below:\n(Thread 1) | (Thread 2)\n| ieee80211_send_beacon()\nieee80211_beacons_stop() | mod_timer()\nspin_lock_irqsave() //(1) | (wait a time)\n... | ieee80211_send_beacon_cb()\ndel_timer_sync() | spin_lock_irqsave() //(2)\n(wait timer to stop) | ...\nWe hold ieee->beacon_lock in position (1) of thread 1 and use\ndel_timer_sync() to wait timer to stop, but timer handler\nalso need ieee->beacon_lock in position (2) of thread 2.\nAs a result, ieee80211_beacons_stop() will block forever.\nThis patch extracts del_timer_sync() from the protection of\nspin_lock_irqsave(), which could let timer handler to obtain\nthe needed lock."], "name": "CVE-2022-49305", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49305\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49305\nhttps://lore.kernel.org/linux-cve-announce/2025022635-CVE-2022-49305-9a46@gregkh/T"], "threat_severity": "Moderate"}

{}