CriticalFix available

xdp: reject clones that overrun skb_shared_info tailroom

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: xdp: reject clones that overrun skb_shared_info tailroom xdpf_clone() clones broadcast copies into a single page and sets frame_sz to PAGE_SIZE. __xdp_build_skb_from_frame() later treats that page like a normal XDP frame and expects the usual skb_shared_info tailroom at the end of the buffer. The current check only rejects frames whose linear xdp_frame header, headroom, and packet data exceed PAGE_SIZE. A source frame backed by a larger allocation can still satisfy that check while extending into the clone's required shared-info area. When such a clone is converted back into an skb, build_skb_around() places skb_shared_info over live packet bytes and later writes can corrupt XDP return metadata. Reject clones unless their linear area fits inside SKB_WITH_OVERHEAD(PAGE_SIZE), matching the tailroom requirement already enforced by the XDP-to-skb conversion path.

Products: Kernel
Affected versions: Not specified
Fixed versions: 5.15.216, 6.1.183, 6.12.104, 6.18.45, 6.6.152, 7.1.9
CVEs: CVE-2026-74616
Confirmed fixed CVEs: Not specified
Updated in this feed: 5 Nov 2026, 01:31 UTC · Revision 1

Source evidence

xdp: reject clones that overrun skb_shared_info tailroom

core-osv · Original source

Published 22 Aug 2026, 15:32 UTC

osv:CVE-2026-74616

Kernel

Fixed versions: 5.15.216, 6.1.183, 6.6.152, 6.12.104, 6.18.45, 7.1.9

Complete source record

{
  "id": "afd16f87682bf7cf35e20c20ad4637be8511d62cb38d13cb589295d0ff12bca0",
  "url": "https://osv.dev/vulnerability/CVE-2026-74616",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "xdp: reject clones that overrun skb_shared_info tailroom",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: xdp: reject clones that overrun skb_shared_info tailroom xdpf_clone() clones broadcast copies into a single page and sets frame_sz to PAGE_SIZE. __xdp_build_skb_from_frame() later treats that page like a normal XDP frame and expects the usual skb_shared_info tailroom at the end of the buffer. The current check only rejects frames whose linear xdp_frame header, headroom, and packet data exceed PAGE_SIZE. A source frame backed by a larger allocation can still satisfy that check while extending into the clone's required shared-info area. When such a clone is converted back into an skb, build_skb_around() places skb_shared_info over live packet bytes and later writes can corrupt XDP return metadata. Reject clones unless their linear area fits inside SKB_WITH_OVERHEAD(PAGE_SIZE), matching the tailroom requirement already enforced by the XDP-to-skb conversion path.",
    "evidence": "osv:CVE-2026-74616",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.216",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.183",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.152",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.104",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.45",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.9",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-74616",
      "aliases": [
        "CVE-2026-74616"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "e624d4ed4aa8cc3c69d1359b0aaea539203ed266"
                },
                {
                  "fixed": "58408982fa39f9758124cec169f42854d6f98f35"
                },
                {
                  "fixed": "685edea27ac68d08fe4dbd3de74b858d2ad8e830"
                },
                {
                  "fixed": "ba13763d667e008e185fedf592d53846a5b457d1"
                },
                {
                  "fixed": "ef4b7c7046d29a67090de15af0da0d1ae8d1b192"
                },
                {
                  "fixed": "fab820f1691a9e26d9031f18aae1e9ce09078f92"
                },
                {
                  "fixed": "f463b6f4957c9c3fd1c75f8d3e5af4879fa609c0"
                },
                {
                  "fixed": "e48e8edbef2eb824201495daa5234560f632b23c"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74616.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.14.0"
                },
                {
                  "fixed": "5.15.216"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.183"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.152"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.104"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.45"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.9"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74616.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:41.121729264Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/58408982fa39f9758124cec169f42854d6f98f35",
        "https://git.kernel.org/stable/c/685edea27ac68d08fe4dbd3de74b858d2ad8e830",
        "https://git.kernel.org/stable/c/ba13763d667e008e185fedf592d53846a5b457d1",
        "https://git.kernel.org/stable/c/e48e8edbef2eb824201495daa5234560f632b23c",
        "https://git.kernel.org/stable/c/ef4b7c7046d29a67090de15af0da0d1ae8d1b192",
        "https://git.kernel.org/stable/c/f463b6f4957c9c3fd1c75f8d3e5af4879fa609c0",
        "https://git.kernel.org/stable/c/fab820f1691a9e26d9031f18aae1e9ce09078f92",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74616.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-74616",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74616.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-74616",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 509089,
  "published_at": "2026-08-22T15:32:01.313+00:00"
}