{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "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": "6.19.10-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  serial: core: fix infinite loop in handle_tx() for PORT_UNKNOWN  uart_write_room() and uart_write() behave inconsistently when xmit_buf is NULL (which happens for PORT_UNKNOWN ports that were never properly initialized):  - uart_write_room() returns kfifo_avail() which can be \u003e 0 - uart_write() checks xmit_buf and returns 0 if NULL  This inconsistency causes an infinite loop in drivers that rely on tty_write_room() to determine if they can write:    while (tty_write_room(tty) \u003e 0) {       written = tty-\u003eops-\u003ewrite(...);       // written is always 0, loop never exits   }  For example, caif_serial's handle_tx() enters an infinite loop when used with PORT_UNKNOWN serial ports, causing system hangs.  Fix by making uart_write_room() also check xmit_buf and return 0 if it's NULL, consistent with uart_write().  Reproducer: https://gist.github.com/mrpre/d9a694cc0e19828ee3bc3b37983fde13",
  "id": "DEBIAN-CVE-2026-23472",
  "modified": "2026-09-14T16:47:43.106501331Z",
  "published": "2026-04-03T16:16:34.977Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-23472"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-23472"
  ]
}