xsk: drain continuation descs after overflow in xsk_build_skb()

{
  "id": "e664c9e00e0b78e868eb5e963a2f06a9f7bfb973c652cc5a55fb07d01c09fc4a",
  "url": "https://osv.dev/vulnerability/CVE-2026-74559",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "xsk: drain continuation descs after overflow in xsk_build_skb()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: xsk: drain continuation descs after overflow in xsk_build_skb() Fix generic xmit path multi-buffer logic when packets are either too big (count of descriptors exceed MAX_SKB_FRAGS) or an invalid descriptor is included in fragmented packet. Introduce xdp_sock::drain_cont and act upon this flag - when it is set, keep on consuming descriptors from AF_XDP Tx ring and put them directly onto Cq. Previously these descriptors were silently lost and could never be reached again.",
    "evidence": "osv:CVE-2026-74559",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.114",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.44",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.8",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-74559",
      "aliases": [
        "CVE-2026-74559"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "cf24f5a5feeaae34c1a34d1e04f8ac697290427a"
                },
                {
                  "fixed": "ecd0d1cde0478c232a867f14ec99cf97aff5eb30"
                },
                {
                  "fixed": "ceb00cb87a22c42d20c39336213db2b843ca9e34"
                },
                {
                  "fixed": "5e94d74e4f3baebaa083288f33b4be7ce0a34982"
                },
                {
                  "fixed": "bd44a6dcd4248883de90f5dad53ae80066e27096"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74559.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.6.0"
                },
                {
                  "fixed": "6.12.114"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.44"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.8"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74559.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:41.290442010Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/5e94d74e4f3baebaa083288f33b4be7ce0a34982",
        "https://git.kernel.org/stable/c/bd44a6dcd4248883de90f5dad53ae80066e27096",
        "https://git.kernel.org/stable/c/ceb00cb87a22c42d20c39336213db2b843ca9e34",
        "https://git.kernel.org/stable/c/ecd0d1cde0478c232a867f14ec99cf97aff5eb30",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74559.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-74559",
        "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-2026-74559.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-74559",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 509142,
  "published_at": "2026-08-15T12:28:03.279+00:00"
}