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Ubuntu 24.04 LTS / 26.04 LTS / Pro Realtime 24.04 LTS : Linux kernel (Azure CVM) vulnerabilities (USN-8801-1)

medium Nessus Plugin ID 349107

Synopsis

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

Description

The remote Ubuntu 24.04 LTS / 26.04 LTS / Pro Realtime 24.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8801-1 advisory.

 It was discovered that some Arm processors could complete a broadcast translation lookaside buffer (TLB) invalidation before memory writes made through the invalidated translation were globally observed. A local attacker could possibly use this to write to memory after permission to do so had been revoked, bypassing memory protections or escalating privileges. (CVE-2025-10263)

 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:

 - Character device driver;

 - Networking core;

 - IPv6 networking;

 - Unix domain sockets; (CVE-2026-52938, CVE-2026-53325, CVE-2026-53361, CVE-2026-53362)

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-8801-1

Plugin Details

Severity: Medium

ID: 349107

File Name: ubuntu_USN-8801-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 9/22/2026

Updated: 9/22/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.2

Percentile: 99.76

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.8

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

CVSS Score Source: CVE-2026-53325

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5.1

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, cpe:/o:canonical:ubuntu_linux:pro:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-7.0.0-1013.13-azure-fde

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/22/2026

Vulnerability Publication Date: 6/9/2026

CISA Known Exploited Vulnerability Due Dates: 8/30/2026

Reference Information

CVE: CVE-2025-10263, CVE-2026-52938, CVE-2026-53325, CVE-2026-53361, CVE-2026-53362

USN: 8801-1