{
  "cveId": "CVE-2021-47376",
  "url": "https://patchblox.com/security/cve/CVE-2021-47376",
  "summary": "CVE-2021-47376 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47376, 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:  bpf: Add oversize check before call kvcalloc()...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  bpf: Add oversize check before call kvcalloc()  Commit 7661809d493b (\u0022mm: don\u0027t allow oversized kvmalloc() calls\u0022) add the oversize check. When the allocation is larger than what kmalloc() supports, the following warning triggered:  WARNING: CPU: 0 PID: 8408 at mm/util.c:597 kvmalloc_node\u002B0x108/0x110 mm/util.c:597 Modules linked in: CPU: 0 PID: 8408 Comm: syz-executor221 Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kvmalloc_node\u002B0x108/0x110 mm/util.c:597 Call Trace:  kvmalloc include/linux/mm.h:806 [inline]  kvmalloc_array include/linux/mm.h:824 [inline]  kvcalloc include/linux/mm.h:829 [inline]  check_btf_line kernel/bpf/verifier.c:9925 [inline]  check_btf_info kernel/bpf/verifier.c:10049 [inline]  bpf_check\u002B0xd634/0x150d0 kernel/bpf/verifier.c:13759  bpf_prog_load kernel/bpf/syscall.c:2301 [inline]  __sys_bpf\u002B0x11181/0x126e0 kernel/bpf/syscall.c:4587  __do_sys_bpf kernel/bpf/syscall.c:4691 [inline]  __se_sys_bpf kernel/bpf/syscall.c:4689 [inline]  __x64_sys_bpf\u002B0x78/0x90 kernel/bpf/syscall.c:4689  do_syscall_x64 arch/x86/entry/common.c:50 [inline]  do_syscall_64\u002B0x3d/0xb0 arch/x86/entry/common.c:80  entry_SYSCALL_64_after_hwframe\u002B0x44/0xae",
  "published": "2024-05-21T15:15:23Z",
  "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": 0.00254,
  "epssPercentile": 0.16991,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.14.9-1",
      "fix": "DEBIAN-CVE-2021-47376",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47376",
      "released": "2024-05-21T15:15:23Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.14.9-1",
      "fix": "DEBIAN-CVE-2021-47376",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47376",
      "released": "2024-05-21T15:15:23Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.14.9-1",
      "fix": "DEBIAN-CVE-2021-47376",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47376",
      "released": "2024-05-21T15:15:23Z"
    }
  ],
  "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"
  }
}