{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2023-53660",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2023-53660"
  ],
  "published": "2025-10-07T15:23:56Z",
  "summary": "bpf, cpumap: Handle skb as well when clean up ptr_ring",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, cpumap: Handle skb as well when clean up ptr_ring\n\nThe following warning was reported when running xdp_redirect_cpu with\nboth skb-mode and stress-mode enabled:\n\n  ------------[ cut here ]------------\n  Incorrect XDP memory type (-2128176192) usage\n  WARNING: CPU: 7 PID: 1442 at net/core/xdp.c:405\n  Modules linked in:\n  CPU: 7 PID: 1442 Comm: kworker/7:0 Tainted: G  6.5.0-rc2+ #1\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)\n  Workqueue: events __cpu_map_entry_free\n  RIP: 0010:__xdp_return+0x1e4/0x4a0\n  ......\n  Call Trace:\n   <TASK>\n   ? show_regs+0x65/0x70\n   ? __warn+0xa5/0x240\n   ? __xdp_return+0x1e4/0x4a0\n   ......\n   xdp_return_frame+0x4d/0x150\n   __cpu_map_entry_free+0xf9/0x230\n   process_one_work+0x6b0/0xb80\n   worker_thread+0x96/0x720\n   kthread+0x1a5/0x1f0\n   ret_from_fork+0x3a/0x70\n   ret_from_fork_asm+0x1b/0x30\n   </TASK>\n\nThe reason for the warning is twofold. One is due to the kthread\ncpu_map_kthread_run() is stopped prematurely. Another one is\n__cpu_map_ring_cleanup() doesn't handle skb mode and treats skbs in\nptr_ring as XDP frames.\n\nPrematurely-stopped kthread will be fixed by the preceding patch and\nptr_ring will be empty when __cpu_map_ring_cleanup() is called. But\nas the comments in __cpu_map_ring_cleanup() said, handling and freeing\nskbs in ptr_ring as well to \"catch any broken behaviour gracefully\".",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.21-1+rpt1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v6",
            "binary_version": "1:6.1.21-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v7",
            "binary_version": "1:6.1.21-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v7l",
            "binary_version": "1:6.1.21-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v8",
            "binary_version": "1:6.1.21-1+rpt1"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.21-1+rpt1": {
            "linux_commit": "0afb5e98488aed7017b9bf321b575d0177feb7ed",
            "upstream_version": "6.1.21",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.45"
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-53660"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b58d34068fd9f96bfc7d389988dfaf9a92a8fe00"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cbd000451885801e9bbfd9cf7a7946806a85cb5e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/937345720d18f1ad006ba3d5dcb3fa121037b8a2"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7c62b75cd1a792e14b037fa4f61f9b18914e7de1"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:24:39Z"
  }
}