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Linux Distros Unpatched Vulnerability : CVE-2022-49943

🗓️ 08 Aug 2025 00:00:00Reported by TenableType 
nessus
 nessus
🔗 www.tenable.com👁 1 Views

CVE-2022-49943 Linux unpatched: gadget lockdep circular lock due to udc_mutex scope; no vendor patch

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Code
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
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  script_version("1.16");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/05");

  script_cve_id("CVE-2022-49943");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2022-49943");

  script_set_attribute(attribute:"synopsis", value:
"The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be
patched.");
  script_set_attribute(attribute:"description", value:
"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied
patch available.

  - USB: gadget: Fix obscure lockdep violation for udc_mutex A recent commit expanding the scope of the
    udc_lock mutex in the gadget core managed to cause an obscure and slightly bizarre lockdep violation. In
    abbreviated form: ====================================================== WARNING: possible circular
    locking dependency detected 5.19.0-rc7+ #12510 Not tainted
    ------------------------------------------------------ udevadm/312 is trying to acquire lock:
    ffff80000aae1058 (udc_lock){+.+.}-{3:3}, at: usb_udc_uevent+0x54/0xe0 but task is already holding lock:
    ffff000002277548 (kn->active#4){++++}-{0:0}, at: kernfs_seq_start+0x34/0xe0 which lock already depends on
    the new lock. the existing dependency chain (in reverse order) is: -> #3 (kn->active#4){++++}-{0:0}:
    lock_acquire+0x68/0x84 __kernfs_remove+0x268/0x380 kernfs_remove_by_name_ns+0x58/0xac
    sysfs_remove_file_ns+0x18/0x24 device_del+0x15c/0x440 -> #2 (device_links_lock){+.+.}-{3:3}:
    lock_acquire+0x68/0x84 __mutex_lock+0x9c/0x430 mutex_lock_nested+0x38/0x64 device_link_remove+0x3c/0xa0
    _regulator_put.part.0+0x168/0x190 regulator_put+0x3c/0x54 devm_regulator_release+0x14/0x20 -> #1
    (regulator_list_mutex){+.+.}-{3:3}: lock_acquire+0x68/0x84 __mutex_lock+0x9c/0x430
    mutex_lock_nested+0x38/0x64 regulator_lock_dependent+0x54/0x284 regulator_enable+0x34/0x80
    phy_power_on+0x24/0x130 __dwc2_lowlevel_hw_enable+0x100/0x130 dwc2_lowlevel_hw_enable+0x18/0x40
    dwc2_hsotg_udc_start+0x6c/0x2f0 gadget_bind_driver+0x124/0x1f4 -> #0 (udc_lock){+.+.}-{3:3}:
    __lock_acquire+0x1298/0x20cc lock_acquire.part.0+0xe0/0x230 lock_acquire+0x68/0x84 __mutex_lock+0x9c/0x430
    mutex_lock_nested+0x38/0x64 usb_udc_uevent+0x54/0xe0 Evidently this was caused by the scope of udc_mutex
    being too large. The mutex is only meant to protect udc->driver along with a few other things. As far as I
    can tell, there's no reason for the mutex to be held while the gadget core calls a gadget driver's ->bind
    or ->unbind routine, or while a UDC is being started or stopped. (This accounts for link #1 in the chain
    above, where the mutex is held while the dwc2_hsotg_udc is started as part of driver probing.) Gadget
    drivers' ->disconnect callbacks are problematic. Even though usb_gadget_disconnect() will now acquire the
    udc_mutex, there's a window in usb_gadget_bind_driver() between the times when the mutex is released and
    the ->bind callback is invoked. If a disconnect occurred during that window, we could call the driver's
    ->disconnect routine before its ->bind routine. To prevent this from happening, it will be necessary to
    prevent a UDC from connecting while it has no gadget driver. This should be done already but it doesn't
    seem to be; currently usb_gadget_connect() has no check for this. Such a check will have to be added
    later. Some degree of mutual exclusion is required in soft_connect_store(), which can dereference
    udc->driver at arbitrary times since it is a sysfs callback. The solution here is to acquire the gadget's
    device lock rather than the udc_mutex. Since the driver core guarantees that the device lock is always
    held during driver binding and unbinding, this will make the accesses in soft_connect_store() mutually
    exclusive with any changes to udc->driver. Lastly, it turns out there is one place which should hold the
    udc_mutex but currently does not: The function_show() routine needs protection while it dereferences
    udc->driver. The missing lock and unlock calls are added. (CVE-2022-49943)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2022-49943");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2022-49943");
  script_set_attribute(attribute:"solution", value:
"There is no known solution at this time.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:U/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-49943");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_set_attribute(attribute:"vendor_unpatched", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/06/18");
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  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

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  exit(0);
}

if (!get_kb_item("global_settings/vendor_unpatched")) exit(0, "Unpatched Vulnerabilities Detection not active.");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (empty_or_null(get_one_kb_item("Host/Debian/dpkg-l")) && empty_or_null(get_one_kb_item("Host/RedHat/rpm-list"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

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          {"reference": "linux-cloud-tools-common"},
          {"reference": "linux-doc"},
          {"reference": "linux-gcp"},
          {"reference": "linux-headers-4.4.0"},
          {"reference": "linux-hwe"},
          {"reference": "linux-hwe-edge"},
          {"reference": "linux-image-4.4.0"},
          {"reference": "linux-image-extra-4.4.0"},
          {"reference": "linux-kvm"},
          {"reference": "linux-libc-dev"},
          {"reference": "linux-oracle"},
          {"reference": "linux-source-4.4.0"},
          {"reference": "linux-tools-4.4.0"},
          {"reference": "linux-tools-common"},
          {"reference": "linux-udebs-generic"},
          {"reference": "linux-udebs-generic-lpae"},
          {"reference": "linux-udebs-lowlatency"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "linux-aws-5.0"},
          {"reference": "linux-aws-5.3"},
          {"reference": "linux-aws-5.4"},
          {"reference": "linux-aws-cloud-tools-4.15.0"},
          {"reference": "linux-aws-headers-4.15.0"},
          {"reference": "linux-aws-tools-4.15.0"},
          {"reference": "linux-azure-4.15"},
          {"reference": "linux-azure-5.3"},
          {"reference": "linux-azure-5.4"},
          {"reference": "linux-azure-cloud-tools-4.15.0"},
          {"reference": "linux-azure-edge"},
          {"reference": "linux-azure-headers-4.15.0"},
          {"reference": "linux-azure-tools-4.15.0"},
          {"reference": "linux-cloud-tools-4.15.0"},
          {"reference": "linux-cloud-tools-common"},
          {"reference": "linux-doc"},
          {"reference": "linux-gcp-4.15"},
          {"reference": "linux-gcp-5.3"},
          {"reference": "linux-gcp-5.4"},
          {"reference": "linux-gcp-headers-4.15.0"},
          {"reference": "linux-gcp-tools-4.15.0"},
          {"reference": "linux-gke-4.15"},
          {"reference": "linux-gke-5.4"},
          {"reference": "linux-gkeop-5.4"},
          {"reference": "linux-headers-4.15.0"},
          {"reference": "linux-hwe"},
          {"reference": "linux-hwe-5.4"},
          {"reference": "linux-hwe-edge"},
          {"reference": "linux-ibm-5.4"},
          {"reference": "linux-image-4.15.0"},
          {"reference": "linux-image-unsigned-4.15.0"},
          {"reference": "linux-kvm-cloud-tools-4.15.0"},
          {"reference": "linux-kvm-headers-4.15.0"},
          {"reference": "linux-kvm-tools-4.15.0"},
          {"reference": "linux-libc-dev"},
          {"reference": "linux-modules-4.15.0"},
          {"reference": "linux-modules-extra-4.15.0"},
          {"reference": "linux-oem-headers-4.15.0"},
          {"reference": "linux-oem-tools-4.15.0"},
          {"reference": "linux-oracle"},
          {"reference": "linux-oracle-5.0"},
          {"reference": "linux-oracle-5.3"},
          {"reference": "linux-oracle-5.4"},
          {"reference": "linux-raspi-5.4"},
          {"reference": "linux-source-4.15.0"},
          {"reference": "linux-tools-4.15.0"},
          {"reference": "linux-tools-common"},
          {"reference": "linux-tools-host"},
          {"reference": "linux-udebs-aws"},
          {"reference": "linux-udebs-azure"},
          {"reference": "linux-udebs-generic"},
          {"reference": "linux-udebs-generic-lpae"},
          {"reference": "linux-udebs-kvm"},
          {"reference": "linux-udebs-oem"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "linux-aws-5.11"},
          {"reference": "linux-aws-5.13"},
          {"reference": "linux-aws-5.15"},
          {"reference": "linux-aws-5.8"},
          {"reference": "linux-aws-cloud-tools-5.4.0"},
          {"reference": "linux-aws-headers-5.4.0"},
          {"reference": "linux-aws-tools-5.4.0"},
          {"reference": "linux-azure-5.11"},
          {"reference": "linux-azure-5.13"},
          {"reference": "linux-azure-5.15"},
          {"reference": "linux-azure-5.8"},
          {"reference": "linux-azure-cloud-tools-5.4.0"},
          {"reference": "linux-azure-fde"},
          {"reference": "linux-azure-fde-5.15"},
          {"reference": "linux-azure-headers-5.4.0"},
          {"reference": "linux-azure-tools-5.4.0"},
          {"reference": "linux-bluefield"},
          {"reference": "linux-buildinfo-5.4.0"},
          {"reference": "linux-buildinfo-5.6.0"},
          {"reference": "linux-cloud-tools-5.4.0"},
          {"reference": "linux-cloud-tools-5.6.0"},
          {"reference": "linux-cloud-tools-common"},
          {"reference": "linux-doc"},
          {"reference": "linux-gcp-5.11"},
          {"reference": "linux-gcp-5.13"},
          {"reference": "linux-gcp-5.15"},
          {"reference": "linux-gcp-5.8"},
          {"reference": "linux-gcp-headers-5.4.0"},
          {"reference": "linux-gcp-tools-5.4.0"},
          {"reference": "linux-gke"},
          {"reference": "linux-gke-5.15"},
          {"reference": "linux-gkeop"},
          {"reference": "linux-gkeop-5.15"},
          {"reference": "linux-headers-5.4.0"},
          {"reference": "linux-headers-5.6.0"},
          {"reference": "linux-hwe-5.11"},
          {"reference": "linux-hwe-5.13"},
          {"reference": "linux-hwe-5.15"},
          {"reference": "linux-hwe-5.8"},
          {"reference": "linux-ibm"},
          {"reference": "linux-ibm-5.15"},
          {"reference": "linux-image-5.4.0"},
          {"reference": "linux-image-unsigned-5.4.0"},
          {"reference": "linux-image-unsigned-5.6.0"},
          {"reference": "linux-intel-5.13"},
          {"reference": "linux-intel-iotg-5.15"},
          {"reference": "linux-iot"},
          {"reference": "linux-kvm-cloud-tools-5.4.0"},
          {"reference": "linux-kvm-headers-5.4.0"},
          {"reference": "linux-kvm-tools-5.4.0"},
          {"reference": "linux-libc-dev"},
          {"reference": "linux-lowlatency-hwe-5.15"},
          {"reference": "linux-modules-5.4.0"},
          {"reference": "linux-modules-5.6.0"},
          {"reference": "linux-modules-extra-5.4.0"},
          {"reference": "linux-modules-extra-5.6.0"},
          {"reference": "linux-nvidia-tegra-5.15"},
          {"reference": "linux-oem-5.10"},
          {"reference": "linux-oem-5.13"},
          {"reference": "linux-oem-5.14"},
          {"reference": "linux-oem-5.6-headers-5.6.0"},
          {"reference": "linux-oem-5.6-tools-5.6.0"},
          {"reference": "linux-oem-5.6-tools-common"},
          {"reference": "linux-oem-5.6-tools-host"},
          {"reference": "linux-oracle-5.11"},
          {"reference": "linux-oracle-5.13"},
          {"reference": "linux-oracle-5.15"},
          {"reference": "linux-oracle-5.8"},
          {"reference": "linux-oracle-headers-5.4.0"},
          {"reference": "linux-oracle-tools-5.4.0"},
          {"reference": "linux-raspi-headers-5.4.0"},
          {"reference": "linux-raspi-tools-5.4.0"},
          {"reference": "linux-raspi2"},
          {"reference": "linux-riscv-5.11"},
          {"reference": "linux-riscv-5.15"},
          {"reference": "linux-riscv-5.8"},
          {"reference": "linux-riscv-headers-5.4.0"},
          {"reference": "linux-riscv-tools-5.4.0"},
          {"reference": "linux-source-5.4.0"},
          {"reference": "linux-tools-5.4.0"},
          {"reference": "linux-tools-5.6.0"},
          {"reference": "linux-tools-common"},
          {"reference": "linux-tools-host"},
          {"reference": "linux-udebs-aws"},
          {"reference": "linux-udebs-azure"},
          {"reference": "linux-udebs-generic"},
          {"reference": "linux-udebs-generic-lpae"},
          {"reference": "linux-udebs-kvm"},
          {"reference": "linux-udebs-oem"},
          {"reference": "linux-xilinx-zynqmp"}
        ]
      }
    ]
  },
  "Ubuntu Linux-22.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "22.04",
        "pkgs": [
          {"reference": "linux-allwinner-5.19"},
          {"reference": "linux-aws-5.19"},
          {"reference": "linux-aws-6.2"},
          {"reference": "linux-aws-6.5"},
          {"reference": "linux-aws-cloud-tools-5.15.0"},
          {"reference": "linux-aws-headers-5.15.0"},
          {"reference": "linux-aws-tools-5.15.0"},
          {"reference": "linux-azure-5.19"},
          {"reference": "linux-azure-6.2"},
          {"reference": "linux-azure-6.5"},
          {"reference": "linux-azure-cloud-tools-5.15.0"},
          {"reference": "linux-azure-fde"},
          {"reference": "linux-azure-fde-5.19"},
          {"reference": "linux-azure-fde-6.2"},
          {"reference": "linux-azure-headers-5.15.0"},
          {"reference": "linux-azure-tools-5.15.0"},
          {"reference": "linux-buildinfo-5.15.0"},
          {"reference": "linux-buildinfo-5.17.0"},
          {"reference": "linux-cloud-tools-5.15.0"},
          {"reference": "linux-cloud-tools-5.17.0"},
          {"reference": "linux-cloud-tools-common"},
          {"reference": "linux-doc"},
          {"reference": "linux-gcp-5.19"},
          {"reference": "linux-gcp-6.2"},
          {"reference": "linux-gcp-6.5"},
          {"reference": "linux-gcp-headers-5.15.0"},
          {"reference": "linux-gcp-tools-5.15.0"},
          {"reference": "linux-gke-headers-5.15.0"},
          {"reference": "linux-gke-tools-5.15.0"},
          {"reference": "linux-gkeop"},
          {"reference": "linux-headers-5.15.0"},
          {"reference": "linux-headers-5.17.0"},
          {"reference": "linux-hwe-5.19"},
          {"reference": "linux-hwe-6.2"},
          {"reference": "linux-hwe-6.5"},
          {"reference": "linux-ibm-cloud-tools-5.15.0"},
          {"reference": "linux-ibm-cloud-tools-common"},
          {"reference": "linux-ibm-headers-5.15.0"},
          {"reference": "linux-ibm-source-5.15.0"},
          {"reference": "linux-ibm-tools-5.15.0"},
          {"reference": "linux-ibm-tools-common"},
          {"reference": "linux-image-5.15.0"},
          {"reference": "linux-image-unsigned-5.15.0"},
          {"reference": "linux-image-unsigned-5.17.0"},
          {"reference": "linux-intel-iot-realtime"},
          {"reference": "linux-intel-iotg-cloud-tools-5.15.0"},
          {"reference": "linux-intel-iotg-cloud-tools-common"},
          {"reference": "linux-intel-iotg-headers-5.15.0"},
          {"reference": "linux-intel-iotg-tools-5.15.0"},
          {"reference": "linux-intel-iotg-tools-common"},
          {"reference": "linux-intel-iotg-tools-host"},
          {"reference": "linux-kvm-cloud-tools-5.15.0"},
          {"reference": "linux-kvm-headers-5.15.0"},
          {"reference": "linux-kvm-tools-5.15.0"},
          {"reference": "linux-libc-dev"},
          {"reference": "linux-lowlatency-cloud-tools-5.15.0"},
          {"reference": "linux-lowlatency-cloud-tools-common"},
          {"reference": "linux-lowlatency-headers-5.15.0"},
          {"reference": "linux-lowlatency-hwe-5.19"},
          {"reference": "linux-lowlatency-hwe-6.2"},
          {"reference": "linux-lowlatency-hwe-6.5"},
          {"reference": "linux-lowlatency-tools-5.15.0"},
          {"reference": "linux-lowlatency-tools-common"},
          {"reference": "linux-lowlatency-tools-host"},
          {"reference": "linux-modules-5.15.0"},
          {"reference": "linux-modules-5.17.0"},
          {"reference": "linux-modules-extra-5.15.0"},
          {"reference": "linux-modules-extra-5.17.0"},
          {"reference": "linux-nvidia"},
          {"reference": "linux-nvidia-6.2"},
          {"reference": "linux-nvidia-6.5"},
          {"reference": "linux-nvidia-tegra"},
          {"reference": "linux-nvidia-tegra-igx"},
          {"reference": "linux-oem-5.17-headers-5.17.0"},
          {"reference": "linux-oem-5.17-tools-5.17.0"},
          {"reference": "linux-oem-5.17-tools-host"},
          {"reference": "linux-oem-6.0"},
          {"reference": "linux-oem-6.1"},
          {"reference": "linux-oem-6.5"},
          {"reference": "linux-oracle-6.5"},
          {"reference": "linux-oracle-headers-5.15.0"},
          {"reference": "linux-oracle-tools-5.15.0"},
          {"reference": "linux-raspi-headers-5.15.0"},
          {"reference": "linux-raspi-tools-5.15.0"},
          {"reference": "linux-realtime"},
          {"reference": "linux-riscv-5.19"},
          {"reference": "linux-riscv-6.5"},
          {"reference": "linux-riscv-headers-5.15.0"},
          {"reference": "linux-riscv-tools-5.15.0"},
          {"reference": "linux-source-5.15.0"},
          {"reference": "linux-starfive-5.19"},
          {"reference": "linux-starfive-6.2"},
          {"reference": "linux-starfive-6.5"},
          {"reference": "linux-tools-5.15.0"},
          {"reference": "linux-tools-5.17.0"},
          {"reference": "linux-tools-common"},
          {"reference": "linux-tools-host"},
          {"reference": "linux-udebs-aws"},
          {"reference": "linux-udebs-azure"},
          {"reference": "linux-xilinx-zynqmp"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "linux-buildinfo-6.8.0"},
          {"reference": "linux-cloud-tools-6.8.0"},
          {"reference": "linux-headers-6.8.0"},
          {"reference": "linux-image-6.8.0"},
          {"reference": "linux-modules-6.8.0"},
          {"reference": "linux-modules-iwlwifi-6.8.0"},
          {"reference": "linux-raspi-realtime"},
          {"reference": "linux-realtime"},
          {"reference": "linux-riscv-headers-6.8.0"},
          {"reference": "linux-riscv-tools-6.8.0"},
          {"reference": "linux-tools-6.8.0"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "kernel-rt"},
          {"reference": "kernel-rt-core"},
          {"reference": "kernel-rt-debug"},
          {"reference": "kernel-rt-debug-core"},
          {"reference": "kernel-rt-debug-devel"},
          {"reference": "kernel-rt-debug-devel-matched"},
          {"reference": "kernel-rt-debug-kvm"},
          {"reference": "kernel-rt-debug-modules"},
          {"reference": "kernel-rt-debug-modules-core"},
          {"reference": "kernel-rt-debug-modules-extra"},
          {"reference": "kernel-rt-debug-modules-internal"},
          {"reference": "kernel-rt-debug-modules-partner"},
          {"reference": "kernel-rt-devel"},
          {"reference": "kernel-rt-devel-matched"},
          {"reference": "kernel-rt-kvm"},
          {"reference": "kernel-rt-modules"},
          {"reference": "kernel-rt-modules-core"},
          {"reference": "kernel-rt-modules-extra"},
          {"reference": "kernel-rt-modules-internal"},
          {"reference": "kernel-rt-modules-partner"},
          {"reference": "kernel-rt-selftests-internal"}
        ]
      }
    ]
  }
};

var distro_constraints_values = linux_unpatched::get_distro_constraints(distro_constraints_arr:distro_constraints_array);
if (empty_or_null(distro_constraints_values)) audit(AUDIT_HOST_NOT, 'affected');
var report = linux_unpatched::check_unpatched_constraints(distro_constraints_values:distro_constraints_values);

if (!empty_or_null(report))
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}

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05 Jul 2026 00:00Current
6.4Medium risk
Vulners AI Score6.4
CVSS 3.15.5
EPSS0.00137
1