CVE-2022-49934

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ensuring that from mac80211's\nPOV it is no longer accessed from an RCU read critical section\nbefore we call cfg80211_scan_done()."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:A - The UAF is hit in ieee80211_scan_rx() on the softirq RX path when processing over-the-air Probe Response frames during an active scan; an attacker on the same Wi\u2011Fi RF segment injects those frames.\nAC:L - The attacker controls the RX side by flooding Probe Responses and can retry across frequent automatic scans (observable via the victim\u2019s Probe Requests), making this an attacker-influenced race rather than an uncontrollable condition.\nPR:N - Frame delivery and scan RX handling require no account or capability on the victim; background/connect/scheduled scans run from system WLAN stacks without attacker-held host privileges.\nUI:N - Phones and laptops routinely scan in the background with Wi\u2011Fi enabled, so Probe Responses are processed at scan completion without further victim action at attack time.\nS:U - The use-after-free corrupts mac80211/cfg80211 heap state inside the host kernel only and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - After kfree(scan_req), ieee80211_scan_rx() still reads scan_req->flags via a dangling RCU reference; reclaiming that cfg80211_scan_request object enables arbitrary kernel disclosure.\nI:H - The same sprayable scan_req UAF in the concurrent RX path yields write and control-flow primitives characteristic of exploitable kernel use-after-frees.\nA:H - Concurrent use of the freed scan_req causes a KASAN-confirmed kernel oops/panic-class crash in the scan RX path, so availability impact is complete even without full code execution."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": 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completed\nand __ieee80211_scan_completed() executes, which then calls\ncfg80211_scan_done() leading to the freeing of scan_req.\n\nSince scan_req is rcu_dereference()'d, prevent the racing in\n__ieee80211_scan_completed() by ensuring that from mac80211's\nPOV it is no longer accessed from an RCU read critical section\nbefore we call cfg80211_scan_done()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: mac80211: Se ha corregido el UAF en ieee80211_scan_rx(). ieee80211_scan_rx() intenta acceder a scan_req->flags tras una comprobaci\u00f3n nula, pero se observa un UAF al finalizar el escaneo y se ejecuta __ieee80211_scan_completed(), que a su vez llama a cfg80211_scan_done(), lo que libera scan_req. 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 cfg80211_scan_done()."}], "id": "CVE-2022-49934", "lastModified": "2026-08-04T10:18:00.013", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-06-18T11:15:19.400", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4abc8c07a065ecf771827bde3c63fbbe4aa0c08b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5d20c6f932f2758078d0454729129c894fe353e7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/60deb9f10eec5c6a20252ed36238b55d8b614a2c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6eb181a64fdabf10be9e54de728876667da20255"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/78a07732fbb0934d14827d8f09b9aa6a49ee1aa9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9ad48cbf8b07f10c1e4a7a262b32a9179ae9dd2d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c0445feb80a4d0854898118fa01073701f8d356b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e0ff39448cea654843744c72c6780293c5082cb1"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: wifi: mac80211: Fix UAF in ieee80211_scan_rx()", "id": "2373399", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2373399"}, "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: Fix UAF in ieee80211_scan_rx()\nieee80211_scan_rx() tries to access scan_req->flags after a\nnull check, but a UAF is observed when the scan is completed\nand __ieee80211_scan_completed() executes, which then calls\ncfg80211_scan_done() leading to the freeing of scan_req.\nSince scan_req is rcu_dereference()'d, prevent the racing in\n__ieee80211_scan_completed() by ensuring that from mac80211's\nPOV it is no longer accessed from an RCU read critical section\nbefore we call cfg80211_scan_done()."], "name": "CVE-2022-49934", "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-2022-49934\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49934\nhttps://lore.kernel.org/linux-cve-announce/2025061845-CVE-2022-49934-108e@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-06-23T08:36:34.057116+00:00", "updated": "2025-06-23T08:36:34.057161+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}