{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/core/drop_monitor.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4a9e30764e80693bcf875c776170edce20f94fe0",
              "status": "affected",
              "version": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f",
              "versionType": "git"
            },
            {
              "lessThan": "7089f7ab99c89f443c92d8fcc585e63f2727f0b3",
              "status": "affected",
              "version": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/core/drop_monitor.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.4"
            },
            {
              "lessThan": "5.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.6",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The report path runs in net/core/drop_monitor.c whenever a received packet is dropped or hardware-trapped; a remote unauthenticated attacker triggers it simply by sending packets that get dropped, and controls skb-\u003elen which feeds payload_len and thus the under-sized allocation.\nAC:L - On an affected build the attacker can drive the path at will, tuning packet length byte-by-byte to land the under-budgeted skb exactly at an allocator bucket boundary; no race or unpredictable state is involved.\nPR:N - Enabling packet-alert mode is the victim administrator\u0027s monitoring configuration; the attacker\u0027s own action is only sending packets that get dropped, which needs no account, credentials or privileges on the target.\nUI:N - The drop-report path is executed automatically by the kernel workqueue when packets are dropped; no local user action is needed.\nS:U - The under-allocated skb and the resulting skb_over_panic() are entirely within the kernel\u0027s own security authority; no VM, IOMMU or sandbox boundary is crossed.\nC:N - __nla_reserve() detects the overrun in skb_put() and panics before any data is written or read past the buffer, so no memory contents are disclosed to the attacker.\nI:N - skb_over_panic() aborts before the out-of-bounds payload copy occurs, so no adjacent memory is modified and no control-flow primitive is obtained.\nA:H - The size under-estimation makes skb_put() exceed skb-\u003eend, invoking skb_over_panic() which calls BUG() and takes down the machine, a complete and repeatable denial of service."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:02:22.526Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4a9e30764e80693bcf875c776170edce20f94fe0"
        },
        {
          "url": "https://git.kernel.org/stable/c/7089f7ab99c89f443c92d8fcc585e63f2727f0b3"
        }
      ],
      "title": "drop_monitor: fix size calculations for 64-bit attributes",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68287",
    "datePublished": "2026-08-10T12:02:20.110Z",
    "dateReserved": "2026-07-30T09:28:09.380Z",
    "dateUpdated": "2026-08-17T05:02:22.526Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}