{
  "cveId": "CVE-2021-46915",
  "url": "https://patchblox.com/security/cve/CVE-2021-46915",
  "summary": "CVE-2021-46915 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-46915, released February 27, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  netfilter: nft_limit: avoid possible divide erro...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  netfilter: nft_limit: avoid possible divide error in nft_limit_init  div_u64() divides u64 by u32.  nft_limit_init() wants to divide u64 by u64, use the appropriate math function (div64_u64)  divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8390 Comm: syz-executor188 Not tainted 5.12.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:div_u64_rem include/linux/math64.h:28 [inline] RIP: 0010:div_u64 include/linux/math64.h:127 [inline] RIP: 0010:nft_limit_init\u002B0x2a2/0x5e0 net/netfilter/nft_limit.c:85 Code: ef 4c 01 eb 41 0f 92 c7 48 89 de e8 38 a5 22 fa 4d 85 ff 0f 85 97 02 00 00 e8 ea 9e 22 fa 4c 0f af f3 45 89 ed 31 d2 4c 89 f0 \u003C49\u003E f7 f5 49 89 c6 e8 d3 9e 22 fa 48 8d 7d 48 48 b8 00 00 00 00 00 RSP: 0018:ffffc90009447198 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000200000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff875152e6 RDI: 0000000000000003 RBP: ffff888020f80908 R08: 0000200000000000 R09: 0000000000000000 R10: ffffffff875152d8 R11: 0000000000000000 R12: ffffc90009447270 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS:  000000000097a300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200001c4 CR3: 0000000026a52000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace:  nf_tables_newexpr net/netfilter/nf_tables_api.c:2675 [inline]  nft_expr_init\u002B0x145/0x2d0 net/netfilter/nf_tables_api.c:2713  nft_set_elem_expr_alloc\u002B0x27/0x280 net/netfilter/nf_tables_api.c:5160  nf_tables_newset\u002B0x1997/0x3150 net/netfilter/nf_tables_api.c:4321  nfnetlink_rcv_batch\u002B0x85a/0x21b0 net/netfilter/nfnetlink.c:456  nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:580 [inline]  nfnetlink_rcv\u002B0x3af/0x420 net/netfilter/nfnetlink.c:598  netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]  netlink_unicast\u002B0x533/0x7d0 net/netlink/af_netlink.c:1338  netlink_sendmsg\u002B0x856/0xd90 net/netlink/af_netlink.c:1927  sock_sendmsg_nosec net/socket.c:654 [inline]  sock_sendmsg\u002B0xcf/0x120 net/socket.c:674  ____sys_sendmsg\u002B0x6e8/0x810 net/socket.c:2350  ___sys_sendmsg\u002B0xf3/0x170 net/socket.c:2404  __sys_sendmsg\u002B0xe5/0x1b0 net/socket.c:2433  do_syscall_64\u002B0x2d/0x70 arch/x86/entry/common.c:46  entry_SYSCALL_64_after_hwframe\u002B0x44/0xae",
  "published": "2024-02-27T07:15:08Z",
  "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": 0.00241,
  "epssPercentile": 0.15294,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.10.38-1",
      "fix": "DEBIAN-CVE-2021-46915",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-46915",
      "released": "2024-02-27T07:15:08Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.10.38-1",
      "fix": "DEBIAN-CVE-2021-46915",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-46915",
      "released": "2024-02-27T07:15:08Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.10.38-1",
      "fix": "DEBIAN-CVE-2021-46915",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-46915",
      "released": "2024-02-27T07:15:08Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T13:31:49Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}