{
  "cveId": "CVE-2026-90250",
  "url": "https://patchblox.com/security/cve/CVE-2026-90250",
  "summary": "CVE-2026-90250 is fixed in 39 products on 1 platform, first by DEBIAN-CVE-2026-90250, released September 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "bpf, cgroup: Fix storage null-ptr-deref after replacing prog",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  bpf, cgroup: Fix storage null-ptr-deref after replacing prog  Syzkaller reported a storage null-ptr-deref issue after replacing prog. This occurs in the following scenario: 1. prog A, an empty prog, is attached to a cgrp. 2. prog B uses BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE and calls the    bpf_get_local_storage helper. 3. link_update is called to replace prog A with prog B.  The reason is that __cgroup_bpf_replace fails to alloc and assign the required cgrp storage for the incoming replacement prog. Consequently, the new prog inherits an uninit storage, leading to null-ptr-deref panic when kick the new prog.  Fix this by rejecting a link update if new_prog\u0027s cgroup storage is incompatible with link-\u003Eprog.",
  "published": "2026-09-17T17:17:21Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "epss": 0.00206,
  "epssPercentile": 0.1073,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-90250",
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  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T13:31:49Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}