netfilter: handle unreadable frags

{
  "id": "ce1e6e1dd4ce8432107656c92a35521e9a9313d3ac497edb3463d7cabef98e2d",
  "url": "https://osv.dev/vulnerability/CVE-2026-64414",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "netfilter: handle unreadable frags",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: netfilter: handle unreadable frags sashiko reports: When an skb with unreadable fragments (such as from devmem TCP, where skb_frags_readable(skb) returns false) is processed by the u32 module, skb_copy_bits() will safely return a negative error code [..] xt_u32: bail out with hotdrop in this case. gather_frags: return -1, just as if we had no fragment header. nfnetlink_queue: restrict to the linear part. nfnetlink_log: restrict to the linear part. v2: - skb_zerocopy helpers don't copy readable flag, i.e. nfnetlink_queue is broken too xt_u32 shouldn't return true if hotdrop was set.",
    "evidence": "osv:CVE-2026-64414",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "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": "high",
    "structured": {
      "id": "CVE-2026-64414",
      "aliases": [
        "CVE-2026-64414"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "65249feb6b3df9e17bab5911ee56fa7b0971e231"
                },
                {
                  "fixed": "3b13e7635795394705920cca1e1db7e4ca2e334b"
                },
                {
                  "fixed": "fc5bfe63bacf8a3ae307b62b34206406ca733354"
                },
                {
                  "fixed": "57056be3ec12e7d9ecd20a60d4060f510e4f284c"
                },
                {
                  "fixed": "da5b58478a9c1b85608c9e40a3b8432d071b409e"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64414.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.12.0"
                },
                {
                  "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-2026-64414.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:42.440217156Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3b13e7635795394705920cca1e1db7e4ca2e334b",
        "https://git.kernel.org/stable/c/57056be3ec12e7d9ecd20a60d4060f510e4f284c",
        "https://git.kernel.org/stable/c/da5b58478a9c1b85608c9e40a3b8432d071b409e",
        "https://git.kernel.org/stable/c/fc5bfe63bacf8a3ae307b62b34206406ca733354",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64414.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-64414",
        "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-2026-64414.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-64414",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 510026,
  "published_at": "2026-07-25T08:50:54.495+00:00"
}