Ubuntu 18.04 LTS : linux kernel vulnerabilities (USN-4465-1)

low Nessus Plugin ID 139693
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VPR Score: 5.2


The remote Ubuntu host is missing one or more security-related patches.


It was discovered that the XFS file system implementation in the Linux kernel did not properly validate meta data in some circumstances. An attacker could use this to construct a malicious XFS image that, when mounted, could cause a denial of service. (CVE-2020-12655) It was discovered that the bcache subsystem in the Linux kernel did not properly release a lock in some error conditions. A local attacker could possibly use this to cause a denial of service. (CVE-2020-12771) Kyungtae Kim discovered that the USB testing driver in the Linux kernel did not properly deallocate memory on disconnect events. A physically proximate attacker could use this to cause a denial of service (memory exhaustion). (CVE-2020-15393).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected packages.

See Also


Plugin Details

Severity: Low

ID: 139693

File Name: ubuntu_USN-4465-1.nasl

Version: 1.4

Type: local

Agent: unix

Published: 8/19/2020

Updated: 9/21/2020

Dependencies: ssh_get_info.nasl, linux_alt_patch_detect.nasl

Risk Information

Risk Factor: Low

VPR Score: 5.2

CVSS Score Source: CVE-2020-24394

CVSS v2.0

Base Score: 3.6

Temporal Score: 2.7

Vector: AV:L/AC:L/Au:N/C:P/I:P/A:N

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 7.1

Temporal Score: 6.2

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-gke-5.3, p-cpe:/a:canonical:ubuntu_linux:linux-image-gkeop-5.3, cpe:/o:canonical:ubuntu_linux:18.04:-:lts

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 8/23/2020

Vulnerability Publication Date: 5/5/2020

Reference Information

CVE: CVE-2020-12655, CVE-2020-12771, CVE-2020-15393, CVE-2020-24394

USN: 4465-1