{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f"
            },
            {
              "fixed": "8fd6975d2aecc36b25ee82b6aef88e62a3527ccb"
            },
            {
              "fixed": "5e9c8baee0329fbefe7c67aea945e2a07f15e98b"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.4.0"
            },
            {
              "fixed": "7.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68288.json"
  },
  "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.",
  "id": "CVE-2026-68288",
  "modified": "2026-08-12T03:51:26.155231715Z",
  "published": "2026-08-10T12:02:21.097Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5e9c8baee0329fbefe7c67aea945e2a07f15e98b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8fd6975d2aecc36b25ee82b6aef88e62a3527ccb"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68288.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68288"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "net: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD"
}