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Ubuntu 20.04 LTS : Linux kernel (IoT) vulnerabilities (USN-7640-1)

high Nessus Plugin ID 242279

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-7640-1 advisory.

 It was discovered that the CIFS network file system implementation in the Linux kernel did not properly verify the target namespace when handling upcalls. An attacker could use this to expose sensitive information. (CVE-2025-2312)

 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:

 - ARM64 architecture;

 - PowerPC architecture;

 - x86 architecture;

 - Block layer subsystem;

 - Drivers core;

 - Network block device driver;

 - Character device driver;

 - iSCSI Boot Firmware Table Attributes driver;

 - GPU drivers;

 - HID subsystem;

 - InfiniBand drivers;

 - Media drivers;

 - MemoryStick subsystem;

 - Network drivers;

 - NTB driver;

 - PCI subsystem;

 - PPS (Pulse Per Second) driver;

 - PTP clock framework;

 - RapidIO drivers;

 - Real Time Clock drivers;

 - SCSI subsystem;

 - SLIMbus drivers;

 - QCOM SoC drivers;

 - Trusted Execution Environment drivers;

 - Thermal drivers;

 - USB DSL drivers;

 - USB Device Class drivers;

 - USB core drivers;

 - USB Gadget drivers;

 - USB Host Controller drivers;

 - Renesas USBHS Controller drivers;

 - File systems infrastructure;

 - BTRFS file system;

 - Ceph distributed file system;

 - JFS file system;

 - NILFS2 file system;

 - UBI file system;

 - KVM subsystem;

 - L3 Master device support module;

 - Netfilter;

 - Process Accounting mechanism;

 - printk logging mechanism;

 - Scheduler infrastructure;

 - Tracing infrastructure;

 - Memory management;

 - 802.1Q VLAN protocol;

 - Asynchronous Transfer Mode (ATM) subsystem;

 - B.A.T.M.A.N. meshing protocol;

 - Bluetooth subsystem;

 - Networking core;

 - IPv4 networking;

 - IPv6 networking;

 - Logical Link layer;

 - NFC subsystem;

 - Open vSwitch;

 - Rose network layer;

 - Network traffic control;

 - Sun RPC protocol;

 - Wireless networking;

 - Tomoyo security module;

 - USB sound devices; (CVE-2025-21753, CVE-2025-22071, CVE-2025-21898, CVE-2025-22073, CVE-2024-58072, CVE-2025-21905, CVE-2024-57986, CVE-2025-21749, CVE-2024-58020, CVE-2025-21806, CVE-2025-21917, CVE-2025-21719, CVE-2025-21835, CVE-2025-21735, CVE-2025-21922, CVE-2025-21781, CVE-2025-21904, CVE-2025-39735, CVE-2025-21715, CVE-2025-22007, CVE-2024-58010, CVE-2024-58052, CVE-2025-22021, CVE-2025-21996, CVE-2025-22086, CVE-2025-21971, CVE-2023-53034, CVE-2025-21721, CVE-2025-22035, CVE-2025-21722, CVE-2025-22045, CVE-2025-21935, CVE-2024-58069, CVE-2024-58017, CVE-2025-21823, CVE-2025-21959, CVE-2024-26996, CVE-2024-58058, CVE-2025-21846, CVE-2024-58009, CVE-2025-22018, CVE-2025-21926, CVE-2024-57980, CVE-2025-21728, CVE-2025-21909, CVE-2025-21992, CVE-2024-26689, CVE-2024-57973, CVE-2025-21772, CVE-2024-56599, CVE-2025-21791, CVE-2025-21718, CVE-2025-21866, CVE-2025-21708, CVE-2024-58055, CVE-2025-21957, CVE-2025-37937, CVE-2025-21704, CVE-2024-58093, CVE-2025-21877, CVE-2025-22054, CVE-2023-52664, CVE-2025-21776, CVE-2024-50055, CVE-2025-21765, CVE-2025-21862, CVE-2025-21865, CVE-2024-58014, CVE-2021-47211, CVE-2025-21956, CVE-2025-21736, CVE-2021-47191, CVE-2025-21647, CVE-2025-21920, CVE-2024-58051, CVE-2025-21782, CVE-2025-21934, CVE-2023-52741, CVE-2025-38637, CVE-2025-21925, CVE-2025-21763, CVE-2025-22063, CVE-2024-26982, CVE-2025-23136, CVE-2024-57979, CVE-2025-22079, CVE-2025-22005, CVE-2025-21785, CVE-2025-21859, CVE-2024-58085, CVE-2025-21764, CVE-2024-53168, CVE-2024-58002, CVE-2025-21928, CVE-2025-21914, CVE-2024-56551, CVE-2024-58007, CVE-2024-58001, CVE-2024-57981, CVE-2024-58083, CVE-2025-21762, CVE-2025-21910, CVE-2025-21760, CVE-2025-21948, CVE-2025-21993, CVE-2024-58090, CVE-2025-21991, CVE-2025-21848, CVE-2025-21811, CVE-2024-58071, CVE-2025-21787, CVE-2025-21731, CVE-2025-21814, CVE-2025-22004, CVE-2025-21744, CVE-2025-21858, CVE-2025-21916, CVE-2023-52927, CVE-2025-22020, CVE-2025-21871, CVE-2025-21761, CVE-2024-58063, CVE-2024-57977)

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-7640-1

Plugin Details

Severity: High

ID: 242279

File Name: ubuntu_USN-7640-1.nasl

Version: 1.1

Type: local

Agent: unix

Published: 7/17/2025

Updated: 7/17/2025

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

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-2025-22020

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: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1051-iot

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/16/2025

Vulnerability Publication Date: 7/21/2021

Reference Information

CVE: CVE-2021-47191, CVE-2021-47211, CVE-2023-52664, CVE-2023-52741, CVE-2023-52927, CVE-2023-53034, CVE-2024-26689, CVE-2024-26982, CVE-2024-26996, CVE-2024-50055, CVE-2024-53168, CVE-2024-56551, CVE-2024-56599, CVE-2024-57973, CVE-2024-57977, CVE-2024-57979, CVE-2024-57980, CVE-2024-57981, CVE-2024-57986, CVE-2024-58001, CVE-2024-58002, CVE-2024-58007, CVE-2024-58009, CVE-2024-58010, CVE-2024-58014, CVE-2024-58017, CVE-2024-58020, CVE-2024-58051, CVE-2024-58052, CVE-2024-58055, CVE-2024-58058, CVE-2024-58063, CVE-2024-58069, CVE-2024-58071, CVE-2024-58072, CVE-2024-58083, CVE-2024-58085, CVE-2024-58090, CVE-2024-58093, CVE-2025-21647, CVE-2025-21704, CVE-2025-21708, CVE-2025-21715, CVE-2025-21718, CVE-2025-21719, CVE-2025-21721, CVE-2025-21722, CVE-2025-21728, CVE-2025-21731, CVE-2025-21735, CVE-2025-21736, CVE-2025-21744, CVE-2025-21749, CVE-2025-21753, CVE-2025-21760, CVE-2025-21761, CVE-2025-21762, CVE-2025-21763, CVE-2025-21764, CVE-2025-21765, CVE-2025-21772, CVE-2025-21776, CVE-2025-21781, CVE-2025-21782, CVE-2025-21785, CVE-2025-21787, CVE-2025-21791, CVE-2025-21806, CVE-2025-21811, CVE-2025-21814, CVE-2025-21823, CVE-2025-21835, CVE-2025-21846, CVE-2025-21848, CVE-2025-21858, CVE-2025-21859, CVE-2025-21862, CVE-2025-21865, CVE-2025-21866, CVE-2025-21871, CVE-2025-21877, CVE-2025-21898, CVE-2025-21904, CVE-2025-21905, CVE-2025-21909, CVE-2025-21910, CVE-2025-21914, CVE-2025-21916, CVE-2025-21917, CVE-2025-21920, CVE-2025-21922, CVE-2025-21925, CVE-2025-21926, CVE-2025-21928, CVE-2025-21934, CVE-2025-21935, CVE-2025-21948, CVE-2025-21956, CVE-2025-21957, CVE-2025-21959, CVE-2025-21971, CVE-2025-21991, CVE-2025-21992, CVE-2025-21993, CVE-2025-21996, CVE-2025-22004, CVE-2025-22005, CVE-2025-22007, CVE-2025-22018, CVE-2025-22020, CVE-2025-22021, CVE-2025-22035, CVE-2025-22045, CVE-2025-22054, CVE-2025-22063, CVE-2025-22071, CVE-2025-22073, CVE-2025-22079, CVE-2025-22086, CVE-2025-2312, CVE-2025-23136, CVE-2025-37937, CVE-2025-38637, CVE-2025-39735

USN: 7640-1