wifi: ath5k: do not access array OOB

{
  "id": "eae951c683c26fcb7a30ef5acd404af26482ede98c8f4e0a5a552517be622785",
  "url": "https://osv.dev/vulnerability/CVE-2026-46307",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "wifi: ath5k: do not access array OOB",
    "summary": "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.",
    "evidence": "osv:CVE-2026-46307",
    "products": [
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        "prerequisites": [],
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    "severity": "high",
    "structured": {
      "id": "CVE-2026-46307",
      "aliases": [
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      "metrics": [
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          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L"
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      "modified": "2026-10-28T02:30:46.461104951Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-784472.html",
        "https://git.kernel.org/stable/c/568173ad9bd0b46cc6cd937dea8791e9b5eefa57",
        "https://git.kernel.org/stable/c/744c19e266b0d2628c5951439195dcef27eadacf",
        "https://git.kernel.org/stable/c/83226c71af53fb9b3cad40cb9a9a79f36d68c020",
        "https://git.kernel.org/stable/c/9dd6aae4bc7bfa11088d928670a3315eae542769",
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        "https://git.kernel.org/stable/c/ecb1c163166759dec004c1fdb9709b8a5992fc8e",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46307.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-46307",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
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  "source_id": "core-osv",
  "document_id": 514463,
  "published_at": "2026-06-08T15:46:35.059+00:00"
}