{
  "cveId": "CVE-2021-47269",
  "url": "https://patchblox.com/security/cve/CVE-2021-47269",
  "summary": "CVE-2021-47269 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47269, released May 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  usb: dwc3: ep0: fix NULL pointer exception  Ther...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  usb: dwc3: ep0: fix NULL pointer exception  There is no validation of the index from dwc3_wIndex_to_dep() and we might be referring a non-existing ep and trigger a NULL pointer exception. In certain configurations we might use fewer eps and the index might wrongly indicate a larger ep index than existing.  By adding this validation from the patch we can actually report a wrong index back to the caller.  In our usecase we are using a composite device on an older kernel, but upstream might use this fix also. Unfortunately, I cannot describe the hardware for others to reproduce the issue as it is a proprietary implementation.  [   82.958261] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a4 [   82.966891] Mem abort info: [   82.969663]   ESR = 0x96000006 [   82.972703]   Exception class = DABT (current EL), IL = 32 bits [   82.978603]   SET = 0, FnV = 0 [   82.981642]   EA = 0, S1PTW = 0 [   82.984765] Data abort info: [   82.987631]   ISV = 0, ISS = 0x00000006 [   82.991449]   CM = 0, WnR = 0 [   82.994409] user pgtable: 4k pages, 39-bit VAs, pgdp = 00000000c6210ccc [   83.000999] [00000000000000a4] pgd=0000000053aa5003, pud=0000000053aa5003, pmd=0000000000000000 [   83.009685] Internal error: Oops: 96000006 [#1] PREEMPT SMP [   83.026433] Process irq/62-dwc3 (pid: 303, stack limit = 0x000000003985154c) [   83.033470] CPU: 0 PID: 303 Comm: irq/62-dwc3 Not tainted 4.19.124 #1 [   83.044836] pstate: 60000085 (nZCv daIf -PAN -UAO) [   83.049628] pc : dwc3_ep0_handle_feature\u002B0x414/0x43c [   83.054558] lr : dwc3_ep0_interrupt\u002B0x3b4/0xc94  ...  [   83.141788] Call trace: [   83.144227]  dwc3_ep0_handle_feature\u002B0x414/0x43c [   83.148823]  dwc3_ep0_interrupt\u002B0x3b4/0xc94 [   83.181546] ---[ end trace aac6b5267d84c32f ]---",
  "published": "2024-05-21T15:15:15Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.0026,
  "epssPercentile": 0.17852,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.10.46-1",
      "fix": "DEBIAN-CVE-2021-47269",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47269",
      "released": "2024-05-21T15:15:15Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.10.46-1",
      "fix": "DEBIAN-CVE-2021-47269",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47269",
      "released": "2024-05-21T15:15:15Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.10.46-1",
      "fix": "DEBIAN-CVE-2021-47269",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47269",
      "released": "2024-05-21T15:15:15Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}