{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.177-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.95-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.1.3-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  keys: Pin request_key_auth payload in instantiate paths  A: request_key()       B: KEYCTL_INSTANTIATE_IOV ================       =========================  create auth key store rka in auth key wait for helper                        get auth key                        load rka from auth key                        copy user payload                        sleep on #PF  helper completed detach and free rka destroy auth key                        wake up                        use rka-\u003etarget_key                        **USE-AFTER-FREE**  Give request_key_auth payloads a refcount.  Take a payload reference while authkey-\u003esem stabilizes the payload and revocation state.  Hold that reference across the instantiate and reject paths.  Drop the auth key owning reference from revoke and destroy.  [jarkko: Replaced the first two paragraphs of text with an actual  concurrency scenario.]",
  "id": "DEBIAN-CVE-2026-63823",
  "modified": "2026-09-14T16:47:49.884286452Z",
  "published": "2026-07-19T12:16:55.457Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-63823"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-63823"
  ]
}