221 lines
11 KiB
JSON
221 lines
11 KiB
JSON
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"cveId": "CVE-2023-52769",
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"state": "PUBLISHED",
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"dateReserved": "2024-05-21T15:19:24.238Z",
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"datePublished": "2024-05-21T15:30:52.308Z",
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"dateUpdated": "2026-08-05T09:11:20.267Z"
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath12k: fix htt mlo-offset event locking\n\nThe ath12k active pdevs are protected by RCU but the htt mlo-offset\nevent handling code calling ath12k_mac_get_ar_by_pdev_id() was not\nmarked as a read-side critical section.\n\nMark the code in question as an RCU read-side critical section to avoid\nany potential use-after-free issues.\n\nCompile tested only."
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"value": "AV:A - The vulnerable path runs when ath12k firmware delivers HTT_T2H_MSG_TYPE_MLO_TIMESTAMP_OFFSET_IND over CE/HTC into ath12k_htt_mlo_offset_event_handler during Wi‑Fi 7 MLO sync; an attacker must be in RF range of an MLO-capable ath12k AP/STA to drive multi-link activity and related firmware events, matching Adjacent for Wi‑Fi attacks.\nAC:L - An adjacent attacker can sustain MLO operation (and thus MLO-offset indications) while also forcing the other side of the missing-RCU race via deauth/disassoc teardown or malformed-frame firmware asserts that hit ath12k_core_halt()/mac_op_stop and clear pdevs_active, so both sides of the race are attacker-influenced.\nPR:N - HTT T2H MLO-offset handling runs in the firmware-to-host softirq path with no host account, capability, or authentication check; the worst reasonable case is an unauthenticated peer near an ath12k Wi‑Fi 7 MLO AP/open network.\nUI:N - Once the radio is up with MLO active, firmware MLO-offset indications and recovery/teardown workqueues run 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 lets the handler write MLO timestamp fields through ar->pdev after the object may be freed/reclaimed, yielding write and control-flow primitives characteristic of exploitable kernel UAFs.\nA:H - Concurrent use of a deactivated or freed ar/pdev 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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