{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-68288",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-68288"
  ],
  "published": "2026-08-10T12:08:00Z",
  "summary": "net: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD\n\nnet_dm_packet_report_fill() and net_dm_hw_packet_report_fill() open code\nthe NET_DM_ATTR_PAYLOAD attribute to avoid zeroing the packet payload\nbefore overwriting it with skb_copy_bits().\n\nskb_put() reserves nla_total_size(payload_len), i.e. the header plus the\nNLA_ALIGN() padding, but only payload_len bytes are copied in. When\npayload_len is not a multiple of 4 the 1-3 padding bytes are never\ninitialized and are leaked to user space inside the netlink message.\n\nKMSAN confirms the leak for the software path when the packet payload\nlength is not 4-byte aligned:\n\n  BUG: KMSAN: kernel-infoleak in _copy_to_iter\n   _copy_to_iter\n   __skb_datagram_iter\n   skb_copy_datagram_iter\n   netlink_recvmsg\n   sock_recvmsg\n   __sys_recvfrom\n  Uninit was created at:\n   kmem_cache_alloc_node_noprof\n   __alloc_skb\n   net_dm_packet_work\n  Bytes 173-175 of 176 are uninitialized\n\nUse __nla_reserve(), which sets up the attribute header and zeroes the\npadding, instead of open coding the attribute construction.",
  "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": "6.1.189",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-68288"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d427b152b663cb2b19fcd449d792e17edbe4a938"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3c0bc7dcc5f9257d25c59eeb7ccb4df33dcfc446"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/05173de42a9923a3eaadebcb0dd5bc83ffba174c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/89178ffe5bddc99c057ba2768db1f8d9c5e1408c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8fd6975d2aecc36b25ee82b6aef88e62a3527ccb"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5e9c8baee0329fbefe7c67aea945e2a07f15e98b"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-10-03T11:04:09Z"
  }
}