{
  "cveId": "CVE-2026-63955",
  "url": "https://patchblox.com/security/cve/CVE-2026-63955",
  "summary": "CVE-2026-63955 is fixed in linux on 1 platform by DEBIAN-CVE-2026-63955 (version 7.0.12-1), released July 20, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  mm/vmalloc: do not trigger BUG() on BH disabled...",
  "description": "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().",
  "published": "2026-07-19T16:17:14Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00488,
  "epssPercentile": 0.42326,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.0.12-1",
      "fix": "DEBIAN-CVE-2026-63955",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-63955",
      "released": "2026-07-20T12:58:36Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-10T20:03:11Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}