{
  "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": "7.2.6-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  nfsd: guard nfsd_serv deref in nfsd_file_net_dispose  nfsd_file_net_dispose() is the consumer side of l-\u003efreeme: the nfsd service thread loop calls it to drain entries that the filecache garbage collector and shrinker append via nfsd_file_dispose_list_delayed().  During per-net teardown, nn-\u003enfsd_serv is cleared before the filecache laundrette is shut down, so the service thread can still run a dispose pass that finds more than eight entries on l-\u003efreeme and dereferences a NULL svc_serv:      nfsd service thread loop       nfsd_file_net_dispose(nn)         if (!list_empty(\u0026l-\u003efreeme)) {             ...             svc_wake_up(nn-\u003enfsd_serv);   /* nn-\u003enfsd_serv == NULL */         }  The sibling helper nfsd_file_dispose_list_delayed() already documents this ordering and caches nn-\u003enfsd_serv into a local before testing it for NULL.  nfsd_file_net_dispose() was introduced with the same raw svc_wake_up(nn-\u003enfsd_serv) call and never picked up the guard.  Fix by loading nn-\u003enfsd_serv into a local svc_serv pointer and only calling svc_wake_up() when it is non-NULL, matching the pattern in nfsd_file_dispose_list_delayed().",
  "id": "DEBIAN-CVE-2026-93212",
  "modified": "2026-09-25T04:47:25.656761767Z",
  "published": "2026-09-24T16:17:16.133Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-93212"
    }
  ],
  "upstream": [
    "CVE-2026-93212"
  ]
}