{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.176-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.94-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.0.10-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  tty: hvc_iucv: fix off-by-one in number of supported devices  MAX_HVC_IUCV_LINES == HVC_ALLOC_TTY_ADAPTERS == 8. This is the number of entries in:   static struct hvc_iucv_private *hvc_iucv_table[MAX_HVC_IUCV_LINES];  Sometimes hvc_iucv_table[] is limited by: (a)\tif (num \u003e hvc_iucv_devices) // for error detection or (b)\tfor (i = 0; i \u003c hvc_iucv_devices; i++) // in 2 places (so these 2 don't agree; second one appears to be correct to me.)  hvc_iucv_devices can be 0..8. This is a counter. (c)\tif (hvc_iucv_devices \u003e MAX_HVC_IUCV_LINES)  If hvc_iucv_devices == 8, (a) allows the code to access hvc_iucv_table[8]. Oops.",
  "id": "DEBIAN-CVE-2026-53306",
  "modified": "2026-09-14T16:47:47.200999310Z",
  "published": "2026-06-26T20:17:23.877Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-53306"
    }
  ],
  "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-2026-53306"
  ]
}