{
  "cveId": "CVE-2026-93125",
  "url": "https://patchblox.com/security/cve/CVE-2026-93125",
  "summary": "CVE-2026-93125 is fixed in 56 products on 1 platform, first by DEBIAN-CVE-2026-93125, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "bpf: Reject rdonly/rdwr_buf_size kfunc arguments that exceed u32 max",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  bpf: Reject rdonly/rdwr_buf_size kfunc arguments that exceed u32 max  check_kfunc_args() detects a kfunc argument named rdonly_buf_size or rdwr_buf_size and stores reg-\u003Evar_off.value into meta-\u003Er0_size, a u64, and does not bound it. check_kfunc_call() later copies that value into the returned register\u0027s mem_size field:    meta-\u003Er0_size = reg-\u003Evar_off.value;   ...   regs[BPF_REG_0].mem_size = meta.r0_size;  regs[BPF_REG_0].mem_size is u32. A constant whose upper 32 bits are set gets truncated instead of causing a load-time rejection, so the verifier records a PTR_TO_MEM register with an approximately 4 GiB mem_size for whatever allocation the kfunc returned. A later access check against that register uses the truncated, wrong bound.  Reject rdonly_buf_size/rdwr_buf_size values that exceed U32_MAX at the point meta-\u003Er0_size is set.",
  "published": "2026-09-17T17:18:07Z",
  "severity": "Moderate",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00129,
  "epssPercentile": 0.02612,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-93125",
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      "product": "python3-perf6.12-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.111-136.204.amzn2023",
      "fix": "ALAS2023-2026-3193",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3193",
      "released": "2026-11-07T01:06:52Z"
    },
    {
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      "product": "python3-perf6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    },
    {
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      "product": "python3-perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    }
  ],
  "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"
  }
}