{
  "cveId": "CVE-2026-64594",
  "url": "https://patchblox.com/security/cve/CVE-2026-64594",
  "summary": "CVE-2026-64594 is fixed in 15 products on 1 platform, first by DEBIAN-CVE-2026-64594, released August 6, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  usb: gadget: f_fs: initialize reset_work at allo...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  usb: gadget: f_fs: initialize reset_work at allocation time  ffs_fs_kill_sb() unconditionally calls cancel_work_sync() on ffs-\u003Ereset_work when a functionfs instance is unmounted:  \tffs_data_reset(ffs); \tcancel_work_sync(\u0026ffs-\u003Ereset_work);  However ffs-\u003Ereset_work is only ever initialized via INIT_WORK() in ffs_func_set_alt() and ffs_func_disable(), and only on the FFS_DEACTIVATED path. That state is reached solely by ffs_data_closed() when the instance is mounted with the \u0022no_disconnect\u0022 option, so for the common case (no \u0022no_disconnect\u0022, or mounted and unmounted without ever being deactivated) reset_work is never initialized.  ffs_data_new() allocates the ffs_data with kzalloc_obj() and does not initialize reset_work, and ffs_data_reset()/ffs_data_clear() do not touch it either, so reset_work.func is left NULL. cancel_work_sync() on such a work then trips the WARN_ON(!work-\u003Efunc) guard in __flush_work():    WARNING: kernel/workqueue.c:4301 at __flush_work\u002B0x330/0x360, CPU#3: umount   Call trace:    __flush_work    cancel_work_sync    ffs_fs_kill_sb [usb_f_fs]    deactivate_locked_super    deactivate_super    cleanup_mnt    __cleanup_mnt    task_work_run    exit_to_user_mode_loop    el0_svc  On older kernels cancel_work_sync() on a zero-initialized work struct was a silent no-op, which hid the missing initialization.  Initialize reset_work once in ffs_data_new() so it is always valid for the lifetime of the ffs_data, and drop the now-redundant INIT_WORK() calls from the two deactivation paths.",
  "published": "2026-08-06T08:16:34Z",
  "severity": "",
  "epss": 0.00165,
  "epssPercentile": 0.05702,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "dtb-aarch64",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "OPENSUSE-SU-2026:22091-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22091-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
      "platform": "linux",
      "product": "kernel-64kb",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "OPENSUSE-SU-2026:22091-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22091-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
      "platform": "linux",
      "product": "kernel-64kb",
      "release": "sles 16.0",
      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "SUSE-SU-2026:24235-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24235-1",
      "released": "2026-11-07T00:44:01Z"
    },
    {
      "platform": "linux",
      "product": "kernel-azure",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "OPENSUSE-SU-2026:22091-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22091-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
      "platform": "linux",
      "product": "kernel-azure",
      "release": "sles 16.0",
      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "SUSE-SU-2026:24235-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24235-1",
      "released": "2026-11-07T00:44:01Z"
    },
    {
      "platform": "linux",
      "product": "kernel-default",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "OPENSUSE-SU-2026:22091-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22091-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
      "platform": "linux",
      "product": "kernel-default",
      "release": "sles 16.0",
      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "SUSE-SU-2026:24197-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24197-1",
      "released": "2026-11-07T00:44:01Z"
    },
    {
      "platform": "linux",
      "product": "kernel-default-base",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "6.12.0-160000.39.1.160000.2.25",
      "fix": "OPENSUSE-SU-2026:22091-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22091-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
      "platform": "linux",
      "product": "kernel-default-base",
      "release": "sles 16.0",
      "fixedVersion": "6.12.0-160000.39.1.160000.2.26",
      "fix": "SUSE-SU-2026:24235-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24235-1",
      "released": "2026-11-07T00:44:01Z"
    },
    {
      "platform": "linux",
      "product": "kernel-docs",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "OPENSUSE-SU-2026:22091-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22091-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
      "platform": "linux",
      "product": "kernel-docs",
      "release": "sles 16.0",
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      "fix": "SUSE-SU-2026:24235-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24235-1",
      "released": "2026-11-07T00:44:01Z"
    },
    {
      "platform": "linux",
      "product": "kernel-kvmsmall",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "OPENSUSE-SU-2026:22091-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22091-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
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      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "SUSE-SU-2026:24235-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24235-1",
      "released": "2026-11-07T00:44:01Z"
    },
    {
      "platform": "linux",
      "product": "kernel-obs-build",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "OPENSUSE-SU-2026:22091-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22091-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
      "platform": "linux",
      "product": "kernel-obs-qa",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "OPENSUSE-SU-2026:22091-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22091-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
      "platform": "linux",
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      "release": "sles 16.0",
      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "SUSE-SU-2026:24235-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24235-1",
      "released": "2026-11-07T00:44:01Z"
    },
    {
      "platform": "linux",
      "product": "kernel-rt",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "OPENSUSE-SU-2026:22091-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22091-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
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      "fix": "OPENSUSE-SU-2026:22091-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22091-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
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      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "SUSE-SU-2026:24235-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24235-1",
      "released": "2026-11-07T00:44:01Z"
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    {
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      "release": "opensuse-leap 16.0",
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      "fix": "OPENSUSE-SU-2026:22091-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22091-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
      "platform": "linux",
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      "release": "sles 16.0",
      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "SUSE-SU-2026:24235-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24235-1",
      "released": "2026-11-07T00:44:01Z"
    },
    {
      "platform": "linux",
      "product": "kernel-zfcpdump",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "6.12.0-160000.39.1",
      "fix": "OPENSUSE-SU-2026:22091-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22091-1",
      "released": "2026-11-07T00:47:19Z"
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    {
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      "fix": "SUSE-SU-2026:24235-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24235-1",
      "released": "2026-11-07T00:44:01Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.180-1",
      "fix": "DEBIAN-CVE-2026-64594",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-64594",
      "released": "2026-08-06T15:13:07Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
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      "fix": "DEBIAN-CVE-2026-64594",
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      "released": "2026-08-06T15:13:07Z"
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    {
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      "fix": "DEBIAN-CVE-2026-64594",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-64594",
      "released": "2026-08-06T15:13:07Z"
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      "released": "2026-08-06T15:13:07Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T13:31:49Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}