248 lines
12 KiB
JSON
248 lines
12 KiB
JSON
{
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"cveId": "CVE-2023-52776",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-05-21T15:19:24.239Z",
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"datePublished": "2024-05-21T15:30:56.906Z",
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"dateUpdated": "2026-08-05T09:11:23.511Z"
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath12k: fix dfs-radar and temperature event locking\n\nThe ath12k active pdevs are protected by RCU but the DFS-radar and\ntemperature event handling code calling ath12k_mac_get_ar_by_pdev_id()\nwas not marked as a read-side critical section.\n\nMark the code in question as RCU read-side critical sections to avoid\nany potential use-after-free issues.\n\nNote that the temperature event handler looks like a place holder\ncurrently but would still trigger an RCU lockdep splat.\n\nCompile tested only."
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{
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"lang": "en",
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"value": "AV:A - The vulnerable path runs when ath12k firmware delivers WMI_PDEV_DFS_RADAR_DETECTION_EVENTID over CE/HTC into ath12k_wmi_pdev_dfs_radar_detected_event; an attacker must be in RF range to inject radar-like pulses against a DFS AP, matching Adjacent for Wi‑Fi/RF attacks.\nAC:L - An adjacent attacker can repeatedly spoof radar to fire the event handler at will, and the resulting DFS CAC cancel/channel leave/reconfigure races with further in-flight WMI events against pdevs_active, so the attacker influences both sides of the missing-RCU race.\nPR:N - Radar pulses are processed entirely in the firmware-to-host WMI softirq path with no host account, capability, or authentication check; the worst reasonable case is an unauthenticated peer near an ath12k AP on a 5 GHz DFS channel.\nUI:N - Once the radio is up with DFS phyerr offload enabled, firmware radar indications are handled automatically with no victim action such as mounting a device or opening a file.\nS:U - The potential use-after-free corrupts ath12k/mac80211 state inside the host kernel authority only and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - Missing rcu_read_lock around ath12k_mac_get_ar_by_pdev_id() allows use of RCU-protected pdev/ar state after deactivation/teardown; that UAF enables heap reuse and arbitrary kernel disclosure.\nI:H - The same UAF of sprayable ath12k/ieee80211 state while the handler still calls ieee80211_radar_detected(ar->hw) yields write and control-flow primitives characteristic of exploitable kernel UAFs.\nA:H - Concurrent use of a deactivated or freed ar/hw after synchronize_rcu without a matching read-side critical section can oops/panic the kernel, so availability impact is complete even without full code execution."
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}
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}
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"product": "Linux",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/net/wireless/ath/ath12k/wmi.c"
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"status": "unaffected",
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"timestamp": "2024-05-29T18:48:38.223706Z",
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"id": "CVE-2023-52776",
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