{
  "cveId": "CVE-2021-47633",
  "url": "https://patchblox.com/security/cve/CVE-2021-47633",
  "summary": "CVE-2021-47633 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47633, released February 26, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  ath5k: fix OOB in ath5k_eeprom_read_pcal_info_51...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  ath5k: fix OOB in ath5k_eeprom_read_pcal_info_5111  The bug was found during fuzzing. Stacktrace locates it in ath5k_eeprom_convert_pcal_info_5111. When none of the curve is selected in the loop, idx can go up to AR5K_EEPROM_N_PD_CURVES. The line makes pd out of bound. pd = \u0026chinfo[pier].pd_curves[idx];  There are many OOB writes using pd later in the code. So I added a sanity check for idx. Checks for other loops involving AR5K_EEPROM_N_PD_CURVES are not needed as the loop index is not used outside the loops.  The patch is NOT tested with real device.  The following is the fuzzing report  BUG: KASAN: slab-out-of-bounds in ath5k_eeprom_read_pcal_info_5111\u002B0x126a/0x1390 [ath5k] Write of size 1 at addr ffff8880174a4d60 by task modprobe/214  CPU: 0 PID: 214 Comm: modprobe Not tainted 5.6.0 #1 Call Trace:  dump_stack\u002B0x76/0xa0  print_address_description.constprop.0\u002B0x16/0x200  ? ath5k_eeprom_read_pcal_info_5111\u002B0x126a/0x1390 [ath5k]  ? ath5k_eeprom_read_pcal_info_5111\u002B0x126a/0x1390 [ath5k]  __kasan_report.cold\u002B0x37/0x7c  ? ath5k_eeprom_read_pcal_info_5111\u002B0x126a/0x1390 [ath5k]  kasan_report\u002B0xe/0x20  ath5k_eeprom_read_pcal_info_5111\u002B0x126a/0x1390 [ath5k]  ? apic_timer_interrupt\u002B0xa/0x20  ? ath5k_eeprom_init_11a_pcal_freq\u002B0xbc0/0xbc0 [ath5k]  ? ath5k_pci_eeprom_read\u002B0x228/0x3c0 [ath5k]  ath5k_eeprom_init\u002B0x2513/0x6290 [ath5k]  ? ath5k_eeprom_init_11a_pcal_freq\u002B0xbc0/0xbc0 [ath5k]  ? usleep_range\u002B0xb8/0x100  ? apic_timer_interrupt\u002B0xa/0x20  ? ath5k_eeprom_read_pcal_info_2413\u002B0x2f20/0x2f20 [ath5k]  ath5k_hw_init\u002B0xb60/0x1970 [ath5k]  ath5k_init_ah\u002B0x6fe/0x2530 [ath5k]  ? kasprintf\u002B0xa6/0xe0  ? ath5k_stop\u002B0x140/0x140 [ath5k]  ? _dev_notice\u002B0xf6/0xf6  ? apic_timer_interrupt\u002B0xa/0x20  ath5k_pci_probe.cold\u002B0x29a/0x3d6 [ath5k]  ? ath5k_pci_eeprom_read\u002B0x3c0/0x3c0 [ath5k]  ? mutex_lock\u002B0x89/0xd0  ? ath5k_pci_eeprom_read\u002B0x3c0/0x3c0 [ath5k]  local_pci_probe\u002B0xd3/0x160  pci_device_probe\u002B0x23f/0x3e0  ? pci_device_remove\u002B0x280/0x280  ? pci_device_remove\u002B0x280/0x280  really_probe\u002B0x209/0x5d0",
  "published": "2025-02-26T06:37:05Z",
  "severity": "high",
  "cvss": 7.1,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
  "epss": 0.00263,
  "epssPercentile": 0.18281,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.17.3-1",
      "fix": "DEBIAN-CVE-2021-47633",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47633",
      "released": "2025-02-26T06:37:05Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.17.3-1",
      "fix": "DEBIAN-CVE-2021-47633",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47633",
      "released": "2025-02-26T06:37:05Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.17.3-1",
      "fix": "DEBIAN-CVE-2021-47633",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47633",
      "released": "2025-02-26T06:37:05Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}