{
  "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"
            },
            {
              "fixed": "6.12.115-1"
            }
          ],
          "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:  tracing: Save the event file instead of the compatible histogram  create_field_var_hist() creates a histogram on the matched event to supply a field variable, and records it on the target so it can be torn down later:  \thist_data = find_compatible_hist(target_hist_data, file); \t... \t/* Save the compatible histogram information */ \tvar_hist-\u003ehist_data = hist_data;  hist_data is not the histogram it creates. It is one that was already there, whose keys the new one copies. The saved pointer has a single user, unregister_field_var_hists(), which runs when the target is removed:  \tfile = hist_data-\u003efield_var_hists[i]-\u003ehist_data-\u003eevent_file;  find_compatible_hist() matches on keys alone, so it can pick one with no variables of its own. check_var_refs() then returns false and the user can remove it while the target still points at it:   BUG: KASAN: slab-use-after-free in event_hist_trigger_free+0x2b2/0x320  Read of size 8 at addr ffff8880093b90e0 by task init/1   Freed by task 1:   kfree+0x154/0x420   event_hist_trigger_free+0x1d5/0x320   event_hist_trigger_parse+0x35f3/0x69e0   trigger_process_regex+0x1a6/0x250  Save the event file instead. It is all the dereference ever wanted, and it does not go away when the user removes a trigger.",
  "id": "DEBIAN-CVE-2026-99235",
  "modified": "2026-11-03T04:47:35.012144098Z",
  "published": "2026-11-02T16:17:48.790Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-99235"
    }
  ],
  "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-2026-99235"
  ]
}