{
  "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"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  ALSA: seq: Don't leak the extension cell pointer in the bounce payload  The bounce_error_event() embeds the failed event in the bounce payload by pointing data.ext.ptr at it.  When that event is a queued variable-length event, its own data.ext.ptr holds the address of its first extension cell, put there by snd_seq_event_dup().  The payload goes out verbatim through snd_seq_expand_var_event(), so the address reaches userspace.  That is the same address commit 705dd6dcbc0e (\"ALSA: seq: Clear variable event pointer on read\") removed from the event header.  The read path still clears it there, just above the call that expands the payload.  Embed a sanitised copy instead, treated exactly as snd_seq_read() treats the header.  A stack copy is enough because delivery is synchronous and snd_seq_event_dup() copies before returning.  An unprivileged client reaches this by setting SNDRV_SEQ_FILTER_BOUNCE, queueing a variable-length event to a port that does not exist and reading the bounce back.  Eight bytes on 64-bit, from its own pool.",
  "id": "DEBIAN-CVE-2026-90220",
  "modified": "2026-09-18T04:47:29.568429607Z",
  "published": "2026-09-17T17:17:17.440Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-90220"
    }
  ],
  "upstream": [
    "CVE-2026-90220"
  ]
}