{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.1.13-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  nvme-tcp: fix usage of page_frag_cache  nvme uses page_frag_cache to preallocate PDU for each preallocated request of block device. Block devices are created in parallel threads, consequently page_frag_cache is used in not thread-safe manner. That leads to incorrect refcounting of backstore pages and premature free.  That can be catched by !sendpage_ok inside network stack:  WARNING: CPU: 7 PID: 467 at ../net/core/skbuff.c:6931 skb_splice_from_iter+0xfa/0x310. \ttcp_sendmsg_locked+0x782/0xce0 \ttcp_sendmsg+0x27/0x40 \tsock_sendmsg+0x8b/0xa0 \tnvme_tcp_try_send_cmd_pdu+0x149/0x2a0 Then random panic may occur.  Fix that by serializing the usage of page_frag_cache.",
  "id": "DEBIAN-CVE-2026-80862",
  "modified": "2026-09-14T16:47:35.640478244Z",
  "published": "2026-09-04T16:18:15.420Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-80862"
    }
  ],
  "upstream": [
    "CVE-2026-80862"
  ]
}