{
  "cveId": "CVE-2023-53133",
  "url": "https://patchblox.com/security/cve/CVE-2023-53133",
  "summary": "CVE-2023-53133 is fixed in 20 products on 1 platform, first by ALAS2023-2023-148, released March 30, 2023. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  bpf, sockmap: Fix an infinite loop error when le...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  bpf, sockmap: Fix an infinite loop error when len is 0 in tcp_bpf_recvmsg_parser()  When the buffer length of the recvmsg system call is 0, we got the flollowing soft lockup problem:  watchdog: BUG: soft lockup - CPU#3 stuck for 27s! [a.out:6149] CPU: 3 PID: 6149 Comm: a.out Kdump: loaded Not tainted 6.2.0\u002B #30 Hardware name: QEMU Standard PC (Q35 \u002B ICH9, 2009), BIOS 1.15.0-1 04/01/2014 RIP: 0010:remove_wait_queue\u002B0xb/0xc0 Code: 5e 41 5f c3 cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 41 57 \u003C41\u003E 56 41 55 41 54 55 48 89 fd 53 48 89 f3 4c 8d 6b 18 4c 8d 73 20 RSP: 0018:ffff88811b5978b8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff88811a7d3780 RCX: ffffffffb7a4d768 RDX: dffffc0000000000 RSI: ffff88811b597908 RDI: ffff888115408040 RBP: 1ffff110236b2f1b R08: 0000000000000000 R09: ffff88811a7d37e7 R10: ffffed10234fa6fc R11: 0000000000000001 R12: ffff88811179b800 R13: 0000000000000001 R14: ffff88811a7d38a8 R15: ffff88811a7d37e0 FS:  00007f6fb5398740(0000) GS:ffff888237180000(0000) knlGS:0000000000000000 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 000000010b6ba002 CR4: 0000000000370ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace:  \u003CTASK\u003E  tcp_msg_wait_data\u002B0x279/0x2f0  tcp_bpf_recvmsg_parser\u002B0x3c6/0x490  inet_recvmsg\u002B0x280/0x290  sock_recvmsg\u002B0xfc/0x120  ____sys_recvmsg\u002B0x160/0x3d0  ___sys_recvmsg\u002B0xf0/0x180  __sys_recvmsg\u002B0xea/0x1a0  do_syscall_64\u002B0x3f/0x90  entry_SYSCALL_64_after_hwframe\u002B0x72/0xdc  The logic in tcp_bpf_recvmsg_parser is as follows:  msg_bytes_ready: \tcopied = sk_msg_recvmsg(sk, psock, msg, len, flags); \tif (!copied) { \t\twait data; \t\tgoto msg_bytes_ready; \t}  In this case, \u0022copied\u0022 always is 0, the infinite loop occurs.  According to the Linux system call man page, 0 should be returned in this case. Therefore, in tcp_bpf_recvmsg_parser(), if the length is 0, directly return. Also modify several other functions with the same problem.",
  "published": "2023-03-30T21:11:00Z",
  "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": 0.00189,
  "epssPercentile": 0.08612,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-devel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-headers",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-libbpf",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-libbpf-devel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-libbpf-static",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.1.21-1.45",
      "release": "amzn 2023",
      "fixedVersion": "1.0-0.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53133",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53133",
      "released": "2025-05-02T16:15:32Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53133",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53133",
      "released": "2025-05-02T16:15:32Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.1.20-1",
      "fix": "DEBIAN-CVE-2023-53133",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-53133",
      "released": "2025-05-02T16:15:32Z"
    },
    {
      "platform": "linux",
      "product": "perf",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "perf-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "6.1.21-1.45.amzn2023",
      "fix": "ALAS2023-2023-148",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-148",
      "released": "2023-03-30T21:11:00Z"
    }
  ],
  "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"
  }
}