Skip to content
Heist/ feed
Back to feed
CriticalFix available

bpf: Reject fragmented frames in devmap

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject fragmented frames in devmap Devmap broadcast redirects clone the packet for all but the last destination. For native XDP, that clone path copies only the linear xdp_frame data, while fragmented frames keep skb_shared_info in tailroom outside the linear area. Cloning such a frame leaves XDP_FLAGS_HAS_FRAGS set but without valid frag metadata, and the later free path can interpret uninitialized tail data as skb_shared_info, leading to an out-of-bounds access during frame return. Reject fragmented native XDP frames in dev_map_enqueue_clone(). Add the same restriction to the generic XDP clone path in dev_map_redirect_clone(). Generic XDP represents fragmented packets as nonlinear skbs, and rejecting them here keeps clone-based broadcast support aligned between native and generic XDP.

Products
Kernel
Affected versions
Not specified
Fixed versions
5.15.212, 6.1.178, 6.12.96, 6.18.39, 6.6.145, 7.1.4
CVEs
CVE-2026-64355
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 07:43 UTC · Revision 1

Source evidence

bpf: Reject fragmented frames in devmap

core-osv · Original source

Published 25 Jul 2026, 08:50 UTC

In the Linux kernel, the following vulnerability has been resolved: bpf: Reject fragmented frames in devmap Devmap broadcast redirects clone the packet for all but the last destination. For native XDP, that clone path copies only the linear xdp_frame data, while fragmented frames keep skb_shared_info in tailroom outside the linear area. Cloning such a frame leaves XDP_FLAGS_HAS_FRAGS set but without valid frag metadata, and the later free path can interpret uninitialized tail data as skb_shared_info, leading to an out-of-bounds access during frame return. Reject fragmented native XDP frames in dev_map_enqueue_clone(). Add the same restriction to the generic XDP clone path in dev_map_redirect_clone(). Generic XDP represents fragmented packets as nonlinear skbs, and rejecting them here keeps clone-based broadcast support aligned between native and generic XDP.

osv:CVE-2026-64355

Kernel

Fixed versions: 5.15.212, 6.1.178, 6.6.145, 6.12.96, 6.18.39, 7.1.4

Complete source record
{
  "id": "4d1cc2561b088313dae81821dba4d60c6e62e3459e2f3ef310c833be129c35e7",
  "url": "https://osv.dev/vulnerability/CVE-2026-64355",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "bpf: Reject fragmented frames in devmap",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: bpf: Reject fragmented frames in devmap Devmap broadcast redirects clone the packet for all but the last destination. For native XDP, that clone path copies only the linear xdp_frame data, while fragmented frames keep skb_shared_info in tailroom outside the linear area. Cloning such a frame leaves XDP_FLAGS_HAS_FRAGS set but without valid frag metadata, and the later free path can interpret uninitialized tail data as skb_shared_info, leading to an out-of-bounds access during frame return. Reject fragmented native XDP frames in dev_map_enqueue_clone(). Add the same restriction to the generic XDP clone path in dev_map_redirect_clone(). Generic XDP represents fragmented packets as nonlinear skbs, and rejecting them here keeps clone-based broadcast support aligned between native and generic XDP.",
    "evidence": "osv:CVE-2026-64355",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.212",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.178",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.145",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.96",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.39",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-64355",
      "aliases": [
        "CVE-2026-64355"
      ],
      "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": "47baddc856ae7e93a565dd9deeb797999b179466"
                },
                {
                  "fixed": "07a4c11ee8ef4abcb39d922e9e410ae269671cdf"
                },
                {
                  "fixed": "bccbab36ff228e0825eb85d9b0f9b8434cd0a399"
                },
                {
                  "fixed": "c5b4f5efcb55c1af3fe44ff712d31b7fb098a831"
                },
                {
                  "fixed": "a9bb2d9c798cb62a4050a991c27b752770c33afe"
                },
                {
                  "fixed": "51d07c12ca411e692c424ecdabf077f1e61a61be"
                },
                {
                  "fixed": "aa496720618f1a6054f1c870bf10b4f6c99bf656"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64355.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.14.0"
                },
                {
                  "fixed": "5.15.212"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.178"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.145"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.96"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.39"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64355.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.646900165Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/07a4c11ee8ef4abcb39d922e9e410ae269671cdf",
        "https://git.kernel.org/stable/c/47baddc856ae7e93a565dd9deeb797999b179466",
        "https://git.kernel.org/stable/c/51d07c12ca411e692c424ecdabf077f1e61a61be",
        "https://git.kernel.org/stable/c/a9bb2d9c798cb62a4050a991c27b752770c33afe",
        "https://git.kernel.org/stable/c/aa496720618f1a6054f1c870bf10b4f6c99bf656",
        "https://git.kernel.org/stable/c/bccbab36ff228e0825eb85d9b0f9b8434cd0a399",
        "https://git.kernel.org/stable/c/c5b4f5efcb55c1af3fe44ff712d31b7fb098a831",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64355.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-64355",
        "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/2026/64xxx/CVE-2026-64355.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-64355",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 493451,
  "published_at": "2026-07-25T08:50:13.41+00:00"
}