{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f"
            },
            {
              "fixed": "4a9e30764e80693bcf875c776170edce20f94fe0"
            },
            {
              "fixed": "7089f7ab99c89f443c92d8fcc585e63f2727f0b3"
            }
          ],
          "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-2026-68287.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrop_monitor: fix size calculations for 64-bit attributes\n\nnet_dm_packet_report_fill() and net_dm_hw_packet_report_fill() use\nnla_put_u64_64bit() to append 64-bit attributes (NET_DM_ATTR_PC and\nNET_DM_ATTR_TIMESTAMP).\n\nOn 32-bit architectures without CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS,\nnla_put_u64_64bit() may append a 4-byte NET_DM_ATTR_PAD attribute for\n64-bit alignment.\n\nHowever, net_dm_packet_report_size() and net_dm_hw_packet_report_size()\nused nla_total_size(sizeof(u64)) instead of nla_total_size_64bit(sizeof(u64)),\nbudgeting 12 bytes instead of up to 16 bytes.\n\nThis under-estimation of SKB size can lead to an skb_over_panic() when\n__nla_reserve() or skb_put() is subsequently called.\n\nFix this by using nla_total_size_64bit(sizeof(u64)) in both size calculations.",
  "id": "CVE-2026-68287",
  "modified": "2026-08-18T03:30:56.360060792Z",
  "published": "2026-08-10T12:02:20.110Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4a9e30764e80693bcf875c776170edce20f94fe0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7089f7ab99c89f443c92d8fcc585e63f2727f0b3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68287.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68287"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "drop_monitor: fix size calculations for 64-bit attributes"
}