{
  "cveId": "CVE-2021-47641",
  "url": "https://patchblox.com/security/cve/CVE-2021-47641",
  "summary": "CVE-2021-47641 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47641, released February 26, 2025. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  video: fbdev: cirrusfb: check pixclock to avoid...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  video: fbdev: cirrusfb: check pixclock to avoid divide by zero  Do a sanity check on pixclock value to avoid divide by zero.  If the pixclock value is zero, the cirrusfb driver will round up pixclock to get the derived frequency as close to maxclock as possible.  Syzkaller reported a divide error in cirrusfb_check_pixclock.  divide error: 0000 [#1] SMP KASAN PTI CPU: 0 PID: 14938 Comm: cirrusfb_test Not tainted 5.15.0-rc6 #1 Hardware name: QEMU Standard PC (i440FX \u002B PIIX, 1996), BIOS 1.11.0-2 RIP: 0010:cirrusfb_check_var\u002B0x6f1/0x1260  Call Trace:  fb_set_var\u002B0x398/0xf90  do_fb_ioctl\u002B0x4b8/0x6f0  fb_ioctl\u002B0xeb/0x130  __x64_sys_ioctl\u002B0x19d/0x220  do_syscall_64\u002B0x3a/0x80  entry_SYSCALL_64_after_hwframe\u002B0x44/0xae",
  "published": "2025-02-26T06:37:05Z",
  "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": 0.00253,
  "epssPercentile": 0.16865,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.17.3-1",
      "fix": "DEBIAN-CVE-2021-47641",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47641",
      "released": "2025-02-26T06:37:05Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.17.3-1",
      "fix": "DEBIAN-CVE-2021-47641",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47641",
      "released": "2025-02-26T06:37:05Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.17.3-1",
      "fix": "DEBIAN-CVE-2021-47641",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47641",
      "released": "2025-02-26T06:37:05Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}