{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-43011",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-43011"
  ],
  "published": "2026-05-01T14:17:31Z",
  "summary": "net/x25: Fix potential double free of skb",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/x25: Fix potential double free of skb\n\nWhen alloc_skb fails in x25_queue_rx_frame it calls kfree_skb(skb) at\nline 48 and returns 1 (error).\nThis error propagates back through the call chain:\n\nx25_queue_rx_frame returns 1\n    |\n    v\nx25_state3_machine receives the return value 1 and takes the else\nbranch at line 278, setting queued=0 and returning 0\n    |\n    v\nx25_process_rx_frame returns queued=0\n    |\n    v\nx25_backlog_rcv at line 452 sees queued=0 and calls kfree_skb(skb)\nagain\n\nThis would free the same skb twice. Looking at x25_backlog_rcv:\n\nnet/x25/x25_in.c:x25_backlog_rcv() {\n    ...\n    queued = x25_process_rx_frame(sk, skb);\n    ...\n    if (!queued)\n        kfree_skb(skb);\n}",
  "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": "6.1.168",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-43011"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5d0aa038a90b30c9bedde0c41c1fdcd98ecb16e9"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3f5e3005984645bf5bd129c6b13149879580b1fb"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f782dd382203b2a8c4552a628431b7de65a19a7b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/143d4fa68ae9efb83b0c55b12cc7f0d03732a2b1"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/524371398d8463ea7e101fce2cbf3915645d1730"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fa1dbc93530b34fab0da9862426fe9c918c74dc0"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c87dd137c0dad07cc55f98181ff380b0c23d2878"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d10a26aa4d072320530e6968ef945c8c575edf61"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T13:16:28Z"
  }
}