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Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-8098-1)

high Nessus Plugin ID 302760

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8098-1 advisory.

 Qualys discovered that several vulnerabilities existed in the AppArmor Linux kernel Security Module (LSM).
 An unprivileged local attacker could use these issues to load, replace, and remove arbitrary AppArmor profiles causing denial of service, exposure of sensitive information (kernel memory), local privilege escalation, or possibly escape a container. (LP: #2143853)

 Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems:

 - x86 architecture;

 - GPIO subsystem;

 - GPU drivers;

 - MMC subsystem;

 - BTRFS file system;

 - XFRM subsystem;

 - IPv4 networking;

 - IPv6 networking;

 - MAC80211 subsystem;

 - SMC sockets; (CVE-2021-47599, CVE-2022-48875, CVE-2022-49072, CVE-2022-49267, CVE-2024-49927, CVE-2024-56640, CVE-2025-21780, CVE-2025-40215)

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.

Solution

Update the affected kernel package.

See Also

https://ubuntu.com/security/notices/USN-8098-1

Plugin Details

Severity: High

ID: 302760

File Name: ubuntu_USN-8098-1.nasl

Version: 1.1

Type: local

Agent: unix

Published: 3/17/2026

Updated: 3/17/2026

Supported Sensors: Nessus Agent, Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2025-21780

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-227-generic-lpae, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-227-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-227-generic

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

Exploit Ease: No known exploits are available

Patch Publication Date: 3/16/2026

Vulnerability Publication Date: 7/21/2021

Reference Information

CVE: CVE-2021-47599, CVE-2022-48875, CVE-2022-49072, CVE-2022-49267, CVE-2024-49927, CVE-2024-56640, CVE-2025-21780, CVE-2025-40215

USN: 8098-1