{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-46307",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-46307"
  ],
  "published": "2026-06-08T15:46:07Z",
  "summary": "wifi: ath5k: do not access array OOB",
  "details": "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.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.175",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-46307"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ecb1c163166759dec004c1fdb9709b8a5992fc8e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9dd6aae4bc7bfa11088d928670a3315eae542769"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/744c19e266b0d2628c5951439195dcef27eadacf"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/83226c71af53fb9b3cad40cb9a9a79f36d68c020"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d6869537013b1f21b292342752d97868b79b5934"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e9f1081bc775146156def0dbc821b92f35d56afb"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/568173ad9bd0b46cc6cd937dea8791e9b5eefa57"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d748603f12baff112caa3ab7d39f50100f010dbd"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T13:16:28Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 8.3,
      "cvss_v3_severity": "High",
      "scenario": "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."
    }
  }
}