{
  "cveId": "CVE-2026-80660",
  "url": "https://patchblox.com/security/cve/CVE-2026-80660",
  "summary": "CVE-2026-80660 is fixed in 11 products on 1 platform, first by DEBIAN-CVE-2026-80660, released August 29, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  hwmon: (occ) unregister sysfs devices outside oc...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  hwmon: (occ) unregister sysfs devices outside occ lock  occ_active(false) and occ_shutdown() unregister sysfs-backed devices while occ-\u003Elock is held.  hwmon_device_unregister() and sysfs_remove_group() can wait for active sysfs callbacks to drain, and those callbacks can enter the OCC update path and try to take occ-\u003Elock again.  That gives the unregister paths the lock ordering occ-\u003Elock -\u003E sysfs callback drain, while a callback has the opposite edge sysfs callback -\u003E occ-\u003Elock.  This issue was found by our static analysis tool and then manually reviewed against the current tree.  The grounded PoC kept the real unregister and callback carrier:    occ_shutdown()   hwmon_device_unregister()   occ_show_temp_1()   occ_update_response()  Lockdep reported the circular dependency with occ_shutdown() already holding the OCC mutex and hwmon_device_unregister() waiting on the sysfs side:    WARNING: possible circular locking dependency detected   ... (sysfs_lock) ... at: hwmon_device_unregister\u002B0x12/0x30 [vuln_msv]   ... (\u0026test_occ.lock) ... at: occ_shutdown.constprop.0\u002B0xe/0x40 [vuln_msv]   occ_update_response.isra.0\u002B0xb/0x20 [vuln_msv]   occ_show_temp_1.constprop.0.isra.0\u002B0x23/0x40 [vuln_msv]   *** DEADLOCK ***  Serialize hwmon registration and removal with a separate hwmon_lock. Under that lock, detach occ-\u003Ehwmon and update occ-\u003Eactive while occ-\u003Elock is held so concurrent OCC state changes still see a stable state, then drop occ-\u003Elock before calling hwmon_device_unregister().  Remove the driver sysfs group before taking occ-\u003Elock in occ_shutdown(), so draining the driver attributes cannot wait while the OCC mutex is held.  Also make OCC update callbacks return -ENODEV after deactivation, so callbacks that already passed sysfs active protection do not poll the hardware after teardown has detached the hwmon device.",
  "published": "2026-08-28T08:16:51Z",
  "severity": "",
  "epss": 0.00215,
  "epssPercentile": 0.11899,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "kernel-64kb",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.90.1",
      "fix": "SUSE-SU-2026:5091-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5091-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "kernel-azure",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.90.1",
      "fix": "SUSE-SU-2026:5091-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5091-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "kernel-default",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.90.1",
      "fix": "SUSE-SU-2026:5091-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5091-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "kernel-default-base",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.90.1.150700.17.51.1",
      "fix": "SUSE-SU-2026:5091-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5091-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "kernel-docs",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.90.1",
      "fix": "SUSE-SU-2026:5091-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5091-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-SLE15-SP7_Update_24",
      "release": "sles 15.7",
      "fixedVersion": "1-150700.15.3.1",
      "fix": "SUSE-SU-2026:5091-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5091-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "kernel-obs-build",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.90.1",
      "fix": "SUSE-SU-2026:5091-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5091-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "kernel-source",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.90.1",
      "fix": "SUSE-SU-2026:5091-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5091-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "kernel-syms",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.90.1",
      "fix": "SUSE-SU-2026:5091-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5091-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "kernel-zfcpdump",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.90.1",
      "fix": "SUSE-SU-2026:5091-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5091-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.180-1",
      "fix": "DEBIAN-CVE-2026-80660",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-80660",
      "released": "2026-08-29T00:46:20Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.100-1",
      "fix": "DEBIAN-CVE-2026-80660",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-80660",
      "released": "2026-08-29T00:46:20Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.5-1",
      "fix": "DEBIAN-CVE-2026-80660",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-80660",
      "released": "2026-08-29T00:46:20Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}