USN-6651-2: Linux kernel vulnerabilities

Published Feb 28, 2024
·
Updated

It was discovered that a race condition existed in the ATM (Asynchronous Transfer Mode) subsystem of the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-51780) It was discovered that a race condition existed in the AppleTalk networking subsystem of the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-51781) Zhenghan Wang discovered that the generic ID allocator implementation in the Linux kernel did not properly check for null bitmap when releasing IDs. A local attacker could use this to cause a denial of service (system crash). (CVE-2023-6915) Robert Morris discovered that the CIFS network file system implementation in the Linux kernel did not properly validate certain server commands fields, leading to an out-of-bounds read vulnerability. An attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2024-0565) Jann Horn discovered that the iouring subsystem in the Linux kernel did not properly handle the release of certain buffer rings. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2024-0582) Jann Horn discovered that the TLS subsystem in the Linux kernel did not properly handle spliced messages, leading to an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2024-0646)

Affected Software

21 affected componentsFixes available
Ubuntu Linux kernel
All of the following
ubuntu/linux-image-6.5.0-21-lowlatency<6.5.0-21.21.1
6.5.0-21.21.1
Ubuntu Ubuntu=23.10
All of the following
ubuntu/linux-image-6.5.0-21-lowlatency-64k<6.5.0-21.21.1
6.5.0-21.21.1
Ubuntu Ubuntu=23.10
All of the following
ubuntu/linux-image-lowlatency<6.5.0.21.21.15
6.5.0.21.21.15
Ubuntu Ubuntu=23.10
All of the following
ubuntu/linux-image-lowlatency-64k<6.5.0.21.21.15
6.5.0.21.21.15
Ubuntu Ubuntu=23.10
All of the following
ubuntu/linux-image-6.5.0-1015-oem<6.5.0-1015.16
6.5.0-1015.16
Ubuntu Ubuntu=22.04
All of the following
ubuntu/linux-image-6.5.0-21-lowlatency<6.5.0-21.21.1~22.04.1
6.5.0-21.21.1~22.04.1
Ubuntu Ubuntu=22.04
All of the following
ubuntu/linux-image-6.5.0-21-lowlatency-64k<6.5.0-21.21.1~22.04.1
6.5.0-21.21.1~22.04.1
Ubuntu Ubuntu=22.04
All of the following
ubuntu/linux-image-lowlatency-64k-hwe-22.04<6.5.0.21.21.1~22.04.7
6.5.0.21.21.1~22.04.7
Ubuntu Ubuntu=22.04
All of the following
ubuntu/linux-image-lowlatency-hwe-22.04<6.5.0.21.21.1~22.04.7
6.5.0.21.21.1~22.04.7
Ubuntu Ubuntu=22.04
All of the following
ubuntu/linux-image-oem-22.04d<6.5.0.1015.17
6.5.0.1015.17
Ubuntu Ubuntu=22.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/linux-image-6.5.0-21-lowlatency to a version that resolves this vulnerability.

    Fixed in 6.5.0-21.21.1
  2. Upgrade

    Upgrade ubuntu/linux-image-6.5.0-21-lowlatency-64k to a version that resolves this vulnerability.

    Fixed in 6.5.0-21.21.1
  3. Upgrade

    Upgrade ubuntu/linux-image-lowlatency to a version that resolves this vulnerability.

    Fixed in 6.5.0.21.21.15
  4. Upgrade

    Upgrade ubuntu/linux-image-lowlatency-64k to a version that resolves this vulnerability.

    Fixed in 6.5.0.21.21.15
  5. Upgrade

    Upgrade ubuntu/linux-image-6.5.0-1015-oem to a version that resolves this vulnerability.

    Fixed in 6.5.0-1015.16
  6. Upgrade

    Upgrade ubuntu/linux-image-6.5.0-21-lowlatency to a version that resolves this vulnerability.

    Fixed in 6.5.0-21.21.1~22.04.1
  7. Upgrade

    Upgrade ubuntu/linux-image-6.5.0-21-lowlatency-64k to a version that resolves this vulnerability.

    Fixed in 6.5.0-21.21.1~22.04.1
  8. Upgrade

    Upgrade ubuntu/linux-image-lowlatency-64k-hwe-22.04 to a version that resolves this vulnerability.

    Fixed in 6.5.0.21.21.1~22.04.7
  9. Upgrade

    Upgrade ubuntu/linux-image-lowlatency-hwe-22.04 to a version that resolves this vulnerability.

    Fixed in 6.5.0.21.21.1~22.04.7
  10. Upgrade

    Upgrade ubuntu/linux-image-oem-22.04d to a version that resolves this vulnerability.

    Fixed in 6.5.0.1015.17
  11. Upgrade

    Upgrade Linux kernel to a version that resolves this vulnerability.

    Patch USN-6651-2

Event History

Feb 28, 2024
Advisory Published
via Ubuntu·12:00 AM
Data Sourced
via Ubuntu·12:00 AM
DescriptionAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of USN-6651-2?

The severity of USN-6651-2 is critical due to a use-after-free vulnerability that can lead to a denial of service or arbitrary code execution.

2

How do I fix USN-6651-2?

To fix USN-6651-2, upgrade to the latest patched version of the affected Linux kernel, specifically version 6.5.0-21.21.1 or newer.

3

What products are affected by USN-6651-2?

USN-6651-2 affects various Ubuntu versions including 22.04 and 23.10 with specific kernel images like linux-image-lowlatency.

4

Who can exploit the USN-6651-2 vulnerability?

A local attacker with access to the system can exploit the USN-6651-2 vulnerability due to the race condition in the ATM subsystem.

5

What could be the impact of USN-6651-2 if exploited?

If exploited, USN-6651-2 could lead to a system crash or the execution of arbitrary code, compromising system integrity.

Contact

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