{
  "cveId": "CVE-2026-98200",
  "url": "https://patchblox.com/security/cve/CVE-2026-98200",
  "summary": "CVE-2026-98200 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-98200, released October 6, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "hwmon: (hp-wmi-sensors) Fix use-after-free in fungible_show()",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  hwmon: (hp-wmi-sensors) Fix use-after-free in fungible_show()  nsensor-\u003Ecurrent_state is dynamically replaced as the sensor\u0027s state changes. update_numeric_sensor_from_wobj() does this by freeing the old string and installing a new one:  \tif (strcmp(trimmed, nsensor-\u003Ecurrent_state)) { \t\tnew_string = hp_wmi_strdup(dev, trimmed); \t\tif (new_string) { \t\t\tdevm_kfree(dev, nsensor-\u003Ecurrent_state); \t\t\tnsensor-\u003Ecurrent_state = new_string; \t\t} \t}  This function is only ever called from hp_wmi_update_info() while state-\u003Elock is held, so the free-and-replace itself is properly serialized against concurrent updates.  fungible_show(), however, reads the same pointer after the lock has already been dropped:  \terr = hp_wmi_update_info(state, info); \tif (err) \t\treturn err;  \tswitch (prop) { \t... \tcase HP_WMI_PROPERTY_CURRENT_STATE: \t\tseq_printf(seqf, \u0022%s\\n\u0022, nsensor-\u003Ecurrent_state); \t\tbreak;  hp_wmi_update_info() takes state-\u003Elock internally and releases it before returning, so by the time fungible_show() dereferences nsensor-\u003Ecurrent_state in seq_printf(), no lock is held. Two processes reading a sensor\u0027s current_state debugfs entry at overlapping times (or one reading it while another read of the same sensor triggers a refresh) can race: one thread\u0027s seq_printf() can be part-way through printing the string at the moment another thread\u0027s call into update_numeric_sensor_from_wobj() frees it with devm_kfree() and installs a new pointer, causing a use-after-free read.  Take state-\u003Elock around the read in fungible_show() as well, so it can never run concurrently with the free-and-replace in update_numeric_sensor_from_wobj().",
  "published": "2026-10-06T09:18:05Z",
  "severity": "Moderate",
  "cvss": 7.1,
  "epss": 0.00168,
  "epssPercentile": 0.06132,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98200",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.113-1",
      "fix": "DEBIAN-CVE-2026-98200",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98200",
      "released": "2026-10-06T21:56:27Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.8-1",
      "fix": "DEBIAN-CVE-2026-98200",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98200",
      "released": "2026-10-06T21:56:27Z"
    },
    {
      "platform": "linux",
      "product": "linux-6.12",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.12.113-1~deb12u1",
      "fix": "DEBIAN-CVE-2026-98200",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98200",
      "released": "2026-10-06T21:56:27Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}