GHSA-QRX4-Q7HG-2XX2

Vulnerability from github – Published: 2026-06-08 18:31 – Updated: 2026-06-14 06:30
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

wifi: ath5k: do not access array OOB

Vincent reports:

The ath5k driver seems to do an array-index-out-of-bounds access as shown by the UBSAN kernel message: UBSAN: array-index-out-of-bounds in drivers/net/wireless/ath/ath5k/base.c:1741:20 index 4 is out of range for type 'ieee80211_tx_rate [4]' ... Call Trace: dump_stack_lvl+0x5d/0x80 ubsan_epilogue+0x5/0x2b __ubsan_handle_out_of_bounds.cold+0x46/0x4b ath5k_tasklet_tx+0x4e0/0x560 [ath5k] tasklet_action_common+0xb5/0x1c0

It is real. 'ts->ts_final_idx' can be 3 on 5212, so: info->status.rates[ts->ts_final_idx + 1].idx = -1; with the array defined as: struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; while the size is: #define IEEE80211_TX_MAX_RATES 4 is indeed bogus.

Set this 'idx = -1' sentinel only if the array index is less than the array size. As mac80211 will not look at rates beyond the size (IEEE80211_TX_MAX_RATES).

Note: The effect of the OOB write is negligible. It just overwrites the next member of info->status, i.e. ack_signal.

Severity
8.3 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
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{
  "affected": [],
  "aliases": [
    "CVE-2026-46307"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-08T17:16:49Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath5k: do not access array OOB\n\nVincent reports:\n\u003e The ath5k driver seems to do an array-index-out-of-bounds access as\n\u003e shown by the UBSAN kernel message:\n\u003e UBSAN: array-index-out-of-bounds in drivers/net/wireless/ath/ath5k/base.c:1741:20\n\u003e index 4 is out of range for type \u0027ieee80211_tx_rate [4]\u0027\n\u003e ...\n\u003e Call Trace:\n\u003e  \u003cTASK\u003e\n\u003e  dump_stack_lvl+0x5d/0x80\n\u003e  ubsan_epilogue+0x5/0x2b\n\u003e  __ubsan_handle_out_of_bounds.cold+0x46/0x4b\n\u003e  ath5k_tasklet_tx+0x4e0/0x560 [ath5k]\n\u003e  tasklet_action_common+0xb5/0x1c0\n\nIt is real. \u0027ts-\u003ets_final_idx\u0027 can be 3 on 5212, so:\n   info-\u003estatus.rates[ts-\u003ets_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 \u0027idx = -1\u0027 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-\u003estatus, i.e. ack_signal.",
  "id": "GHSA-qrx4-q7hg-2xx2",
  "modified": "2026-06-14T06:30:23Z",
  "published": "2026-06-08T18:31:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46307"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/568173ad9bd0b46cc6cd937dea8791e9b5eefa57"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/744c19e266b0d2628c5951439195dcef27eadacf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/83226c71af53fb9b3cad40cb9a9a79f36d68c020"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9dd6aae4bc7bfa11088d928670a3315eae542769"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d6869537013b1f21b292342752d97868b79b5934"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d748603f12baff112caa3ab7d39f50100f010dbd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e9f1081bc775146156def0dbc821b92f35d56afb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ecb1c163166759dec004c1fdb9709b8a5992fc8e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L",
      "type": "CVSS_V3"
    }
  ]
}


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