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vuln-cve/data/2026/46xxx/CVE-2026-46307.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-46307",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-05-13T15:03:33.111Z",
"datePublished": "2026-06-08T15:46:35.059Z",
"dateUpdated": "2026-10-15T01:21:33.220Z"
},
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T12:31:09.813Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath5k: do not access array OOB\n\nVincent reports:\n> The ath5k driver seems to do an array-index-out-of-bounds access as\n> shown by the UBSAN kernel message:\n> UBSAN: array-index-out-of-bounds in drivers/net/wireless/ath/ath5k/base.c:1741:20\n> index 4 is out of range for type 'ieee80211_tx_rate [4]'\n> ...\n> Call Trace:\n> <TASK>\n> dump_stack_lvl+0x5d/0x80\n> ubsan_epilogue+0x5/0x2b\n> __ubsan_handle_out_of_bounds.cold+0x46/0x4b\n> ath5k_tasklet_tx+0x4e0/0x560 [ath5k]\n> tasklet_action_common+0xb5/0x1c0\n\nIt is real. 'ts->ts_final_idx' can be 3 on 5212, so:\n info->status.rates[ts->ts_final_idx + 1].idx = -1;\nwith the array defined as:\n struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES];\nwhile the size is:\n #define IEEE80211_TX_MAX_RATES 4\nis indeed bogus.\n\nSet this 'idx = -1' sentinel only if the array index is less than the\narray size. As mac80211 will not look at rates beyond the size\n(IEEE80211_TX_MAX_RATES).\n\nNote: The effect of the OOB write is negligible. It just overwrites the\nnext member of info->status, i.e. ack_signal."
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"version": "3.1",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L",
"baseScore": 8.3,
"baseSeverity": "HIGH"
},
"scenarios": [
{
"lang": "en",
"value": "AV:A - The flaw fires on AR5212 TX completion in the ath5k driver when multi-rate retry exhausts to series index 3; an adjacent WiFi attacker can induce victim transmissions and RF/rate conditions that reach this path without remote Internet routing.\nAC:L - Once AR5212 hardware with ath5k is present, reaching `ts_final_idx == 3` is normal MRR behavior under poor link quality, and an attacker can reliably force that state through sustained WiFi traffic and interference rather than depending on uncontrollable timing or layout.\nPR:N - Exploitation requires no privileges on the victim host; an adjacent WiFi peer can trigger victim TX completions through standard 802.11 interaction (association, data frames, deauth/retry pressure) without local shell or capability-bearing access.\nUI:N - No victim user action such as mounting a filesystem or opening a file is required; the bug is hit automatically during routine wireless transmit completion handling.\nS:U - Impact is confined to kernel wireless driver TX-status metadata on the same host and does not cross VM, container, or IOMMU security boundaries.\nC:H - The out-of-bounds write corrupts kernel memory in `ieee80211_tx_info.status` (clobbering `ack_signal`), and any OOB kernel memory corruption is treated as enabling information disclosure through corrupted status data fed back into mac80211.\nI:H - The vulnerability is an out-of-bounds write (`rates[ts_final_idx + 1].idx = -1` with `ts_final_idx == 3`) that modifies adjacent kernel metadata beyond the allocated `rates[4]` array.\nA:L - The corruption primarily perturbs TX status/rate-control state rather than reliably panicking production kernels, but can degrade wireless availability through corrupted ACK signal and rate-reporting used by mac80211/minstrel."
}
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}
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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],
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{
"url": "https://git.kernel.org/stable/c/d748603f12baff112caa3ab7d39f50100f010dbd"
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"title": "wifi: ath5k: do not access array OOB",
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