{
  "cveId": "CVE-2026-99220",
  "url": "https://patchblox.com/security/cve/CVE-2026-99220",
  "summary": "CVE-2026-99220 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-99220, released November 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "asymmetric_keys: reject trust keys without IDs",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  asymmetric_keys: reject trust keys without IDs  The PKCS#8 parser deliberately leaves the asym_key_ids payload slot empty. key_or_keyring_common() unconditionally dereferences that slot when a PKCS#8 key is supplied to a key_or_keyring restriction. Both the plain and :chain forms reach this branch, allowing an unprivileged caller to trigger a NULL pointer dereference through KEYCTL_RESTRICT_KEYRING followed by add_key().   Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000  KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]  RIP: 0010:key_or_keyring_common (crypto/asymmetric_keys/restrict.c:205 crypto/asymmetric_keys/restrict.c:279)  Call Trace:   \u003CTASK\u003E   __key_create_or_update (security/keys/key.c:884)   key_create_or_update (security/keys/key.c:1021)   __do_sys_add_key (security/keys/keyctl.c:134)   do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)   entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)   \u003C/TASK\u003E  Kernel panic - not syncing: Fatal exception  Reject an asymmetric restriction key without key IDs. A PKCS#8 private key cannot identify the signer of a candidate certificate and is not a valid trust anchor.",
  "published": "2026-11-02T16:17:46Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "epss": 0.00122,
  "epssPercentile": 0.01955,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-99220",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.115-1",
      "fix": "DEBIAN-CVE-2026-99220",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-99220",
      "released": "2026-11-03T18:58:21Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.14-1",
      "fix": "DEBIAN-CVE-2026-99220",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-99220",
      "released": "2026-11-03T18:58:21Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}