{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-39873",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-39873"
  ],
  "published": "2025-09-23T06:01:33Z",
  "summary": "can: xilinx_can: xcan_write_frame(): fix use-after-free of transmitted SKB",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: xilinx_can: xcan_write_frame(): fix use-after-free of transmitted SKB\n\ncan_put_echo_skb() takes ownership of the SKB and it may be freed\nduring or after the call.\n\nHowever, xilinx_can xcan_write_frame() keeps using SKB after the call.\n\nFix that by only calling can_put_echo_skb() after the code is done\ntouching the SKB.\n\nThe tx_lock is held for the entire xcan_write_frame() execution and\nalso on the can_get_echo_skb() side so the order of operations does not\nmatter.\n\nAn earlier fix commit 3d3c817c3a40 (\"can: xilinx_can: Fix usage of skb\nmemory\") did not move the can_put_echo_skb() call far enough.\n\n[mkl: add \"commit\" in front of sha1 in patch description]\n[mkl: fix indention]",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.153",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-39873"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e202ffd9e54538ef67ec301ebd6d9da4823466c9"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1139321161a3ba5e45e61e0738b37f42f20bc57a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/94b050726288a56a6b8ff55aa641f2fedbd3b44c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/725b33deebd6e4c96fe7893f384510a54258f28f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/668cc1e3bb21101d074e430de1b7ba8fd10189e7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ef79f00be72bd81d2e1e6f060d83cf7e425deee4"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T12:19:11Z"
  }
}