{
  "cveId": "CVE-2026-74738",
  "url": "https://patchblox.com/security/cve/CVE-2026-74738",
  "summary": "CVE-2026-74738 is fixed in linux on 1 platform by DEBIAN-CVE-2026-74738 (version 7.1.10-1), released September 4, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  regmap: sdw-mbq: don\u0027t call an unset readable_re...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  regmap: sdw-mbq: don\u0027t call an unset readable_reg callback  regmap_sdw_mbq_poll_busy() decides whether to poll the Function Busy bit by calling ctx-\u003Ereadable_reg(), which is a straight copy of config-\u003Ereadable_reg. That callback is optional: regmap_readable() treats a NULL -\u003Ereadable_reg as \u0022every register is readable\u0022, and drivers rely on that. es9356 and tac5xx2-sdw both build an MBQ regmap without one.  Since commit ca1b11b36d82 (\u0022regmap: sdw-mbq: Allow defers on undeferrable controls\u0022) the poll runs on every -ENODATA, not only for Controls the driver marked deferrable, so any of those devices answering COMMAND_IGNORED takes the kernel through a NULL function pointer.  Treat a missing callback the way the rest of regmap does and poll.",
  "published": "2026-08-26T15:16:52Z",
  "severity": "",
  "epss": 0.00173,
  "epssPercentile": 0.06829,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.10-1",
      "fix": "DEBIAN-CVE-2026-74738",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-74738",
      "released": "2026-09-04T01:46:23Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}