The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5383-1 advisory.

    David Bouman discovered that the netfilter subsystem in the Linux kernel did not properly validate passed     user register indices. A local attacker could use this to cause a denial of service or possibly execute     arbitrary code. (CVE-2022-1015)

    Brendan Dolan-Gavitt discovered that the Marvell WiFi-Ex USB device driver in the Linux kernel did not     properly handle some error conditions. A physically proximate attacker could use this to cause a denial of     service (system crash). (CVE-2021-43976)

    Wenqing Liu discovered that the f2fs file system implementation in the Linux kernel did not properly     validate inode types while performing garbage collection. An attacker could use this to construct a     malicious f2fs image that, when mounted and operated on, could cause a denial of service (system crash).
    (CVE-2021-44879)

    It was discovered that the UDF file system implementation in the Linux kernel could attempt to dereference     a null pointer in some situations. An attacker could use this to construct a malicious UDF image that,     when mounted and operated on, could cause a denial of service (system crash). (CVE-2022-0617)

    David Bouman discovered that the netfilter subsystem in the Linux kernel did not initialize memory in some     situations. A local attacker could use this to expose sensitive information (kernel memory).
    (CVE-2022-1016)

    Lyu Tao discovered that the NFS implementation in the Linux kernel did not properly handle requests to     open a directory on a regular file. A local attacker could use this to expose sensitive information     (kernel memory). (CVE-2022-24448)

    It was discovered that the VirtIO Bluetooth driver in the Linux kernel did not properly deallocate memory     in some error conditions. A local attacker could possibly use this to cause a denial of service (memory     exhaustion). (CVE-2022-26878)

    It was discovered that the YAM AX.25 device driver in the Linux kernel did not properly deallocate memory     in some error conditions. A local privileged attacker could use this to cause a denial of service (kernel     memory exhaustion). (CVE-2022-24959)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - drivers/bluetooth/virtio_bt.c in the Linux kernel before 5.16.3 has a memory leak (socket buffers have     memory allocated but not freed). (CVE-2022-26878)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Published	Updated	Severity
160027	Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-5383-1)	Nessus	Ubuntu Local Security Checks	4/21/2022	6/3/2026	medium
248144	Linux Distros Unpatched Vulnerability : CVE-2022-26878	Nessus	Misc.	8/11/2025	7/17/2026	medium
276179	TencentOS Server 4: kernel (TSSA-2025:0046)	Nessus	Tencent Local Security Checks	11/20/2025	9/11/2026	high

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