{
  "cveId": "CVE-2026-72112",
  "url": "https://patchblox.com/security/cve/CVE-2026-72112",
  "summary": "CVE-2026-72112 is fixed in linux on 1 platform by DEBIAN-CVE-2026-72112 (version 7.1.5-1), released August 15, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  io_uring/bpf-ops: reject re-registration of an a...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  io_uring/bpf-ops: reject re-registration of an already-bound ops  io_install_bpf() only rejects a second registration on the ctx side (ctx-\u003Ebpf_ops) and sets the per-map back-pointer ops-\u003Epriv unconditionally. The struct_ops link path never advances a map past BPF_STRUCT_OPS_STATE_READY, so the same io_uring_bpf_ops map can be registered more than once, and bpf_io_reg() re-resolves the target ring via fget(ops-\u003Ering_fd) on every call. A caller can therefore point the same ring_fd at a different io_ring_ctx between two BPF_LINK_CREATE calls.  The second registration passes the ctx-\u003Ebpf_ops check (the new ctx has none) and overwrites ops-\u003Epriv, orphaning the first ctx. Teardown (io_eject_bpf()/bpf_io_unreg()) only reaches a ctx through ops-\u003Epriv, so the orphaned ctx is never torn down: its ctx-\u003Eloop_step keeps pointing into the struct_ops trampoline, which is freed once the map is gone. A later io_uring_enter() on the orphaned ring then calls the dangling ctx-\u003Eloop_step from io_run_loop() -- a use-after-free of freed executable memory, reachable by a task with CAP_BPF \u002B CAP_PERFMON.  Reject registration when ops-\u003Epriv is already set, as hid_bpf_reg() does for its struct_ops.",
  "published": "2026-08-15T06:21:25Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00165,
  "epssPercentile": 0.05758,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.5-1",
      "fix": "DEBIAN-CVE-2026-72112",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-72112",
      "released": "2026-08-15T22:38:55Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-10T01:44:33Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}