{
  "cveId": "CVE-2026-53106",
  "url": "https://patchblox.com/security/cve/CVE-2026-53106",
  "summary": "CVE-2026-53106 is fixed in 16 products on 1 platform, first by DEBIAN-CVE-2026-53106, released June 25, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "bpf: Do not allow deleting local storage in NMI",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  bpf: Do not allow deleting local storage in NMI  Currently, local storage may deadlock when deferring freeing selem or local storage through kfree_rcu(), call_rcu() or call_rcu_tasks_trace() in NMI or reentrant. Since deleting selem in NMI is an unlikely use case, partially mitigate it by returning error when calling from bpf_xxx_storage_delete() helpers in NMI. Note that, it is still possible to deadlock through reentrant. A full mitigation requires returning error when irqs_disabled() is true, which, however is too heavy-handed for bpf_xxx_storage_delete().  The long-term solution requires _nolock versions of call_rcu. Another possible solution is to defer the free through irq_work [0], but it would grow the size of selem, which is non-ideal.  The check is only needed in bpf_selem_unlink(), which is used by helpers and syscalls. bpf_selem_unlink_nofail() is fine as it is called during map and owner tear down that never run in NMI or reentrant.  [0] https://lore.kernel.org/bpf/20260205190233.912-1-alexei.starovoitov@gmail.com/",
  "published": "2026-06-24T17:17:24Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00143,
  "epssPercentile": 0.03654,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53106",
  "fixes": [
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  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
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}