194 lines
9.3 KiB
JSON
194 lines
9.3 KiB
JSON
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"dateReserved": "2024-03-04T18:12:48.840Z",
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"datePublished": "2024-03-15T20:14:37.589Z",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmt76: mt7921: fix possible AOOB issue in mt7921_mcu_tx_rate_report\n\nFix possible array out of bound access in mt7921_mcu_tx_rate_report.\nRemove unnecessary varibable in mt7921_mcu_tx_rate_report"
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"value": "AV:L - The OOB access is in parsing an MCU firmware GET_WTBL response inside mt7921_mcu_tx_rate_report, not in processing injected WiFi frames or remote packets; exploitation requires local reachability of the mt7921 driver path on the host.\nAC:L - When rate_idx is out of range the out-of-bounds read is deterministic with no race or other condition outside the attacker’s influence once the MCU returns the malformed index.\nPR:L - An unprivileged local user can generate traffic on an already-associated mt7921 client interface, causing TX-free handling to queue the STA for mt7921_mac_sta_stats_work and the vulnerable MCU query without needing root.\nUI:N - The vulnerable path runs from kernel mac_work/watchdog after normal TX activity; no additional victim interaction is required.\nS:U - Impact stays within the host kernel’s authority; this is not a VM escape, IOMMU bypass, or other cross-boundary compromise.\nC:H - rate_idx is a u8 indexing rate[8], so large values read hundreds of bytes past the event into RX/heap memory, and derived fields are stored in STA tx_rate stats that can be exposed via nl80211 station reporting.\nI:H - Kernel array-index memory unsafety here yields corrupted kernel state (stats written from OOB-derived data) and, under the higher-severity rule for memory-corruption primitives, is treated as enabling integrity compromise rather than a pure crash.\nA:H - Large out-of-bounds reads can fault on invalid kernel addresses and oops/panic the host, so availability impact is complete loss of the system."
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