{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.0.12-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  mm/vmalloc: do not trigger BUG() on BH disabled context  __get_vm_area_node() currently triggers a BUG() if in_interrupt() returns true.  However, in_interrupt() also reports true when BH are disabled.  The bridge code can call rhashtable_lookup_insert_fast() with bottom halves disabled:  __vlan_add()  -\u003e br_fdb_add_local()   spin_lock_bh(\u0026br-\u003ehash_lock); \u003c-- Disable BH    -\u003e fdb_add_local()     -\u003e fdb_create()      -\u003e rhashtable_lookup_insert_fast()       -\u003e kvmalloc()        -\u003e vmalloc()         -\u003e __get_vm_area_node()          -\u003e BUG_ON(in_interrupt())   spin_unlock_bh(\u0026br-\u003ehash_lock)  this triggers the BUG() despite the caller not being in NMI or hard IRQ context.  Replace the in_interrupt() check with in_nmi() || in_hardirq().",
  "id": "DEBIAN-CVE-2026-63955",
  "modified": "2026-09-14T16:47:37.383687198Z",
  "published": "2026-07-19T16:17:14.307Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-63955"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-63955"
  ]
}