USN-6938-1: Linux kernel vulnerabilities

Published Jul 31, 2024
·
Updated

It was discovered that the device input subsystem in the Linux kernel did not properly handle the case when an event code falls outside of a bitmap. A local attacker could use this to cause a denial of service (system crash). (CVE-2022-48619) 黄思聪 discovered that the NFC Controller Interface (NCI) implementation in the Linux kernel did not properly handle certain memory allocation failure conditions, leading to a null pointer dereference vulnerability. A local attacker could use this to cause a denial of service (system crash). (CVE-2023-46343) It was discovered that a race condition existed in the Bluetooth subsystem in the Linux kernel when modifying certain settings values through debugfs. A privileged local attacker could use this to cause a denial of service. (CVE-2024-24857, CVE-2024-24858, CVE-2024-24859) Chenyuan Yang discovered that the Unsorted Block Images (UBI) flash device volume management subsystem did not properly validate logical eraseblock sizes in certain situations. An attacker could possibly use this to cause a denial of service (system crash). (CVE-2024-25739) 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:

Affected Software

38 affected componentsFixes available
All of the following
ubuntu/linux-image-4.4.0-1135-kvm<4.4.0-1135.145
4.4.0-1135.145
Ubuntu Ubuntu=16.04
All of the following
ubuntu/linux-image-4.4.0-1172-aws<4.4.0-1172.187
4.4.0-1172.187
Ubuntu Ubuntu=16.04
All of the following
ubuntu/linux-image-4.4.0-257-generic<4.4.0-257.291
4.4.0-257.291
Ubuntu Ubuntu=16.04
All of the following
ubuntu/linux-image-4.4.0-257-lowlatency<4.4.0-257.291
4.4.0-257.291
Ubuntu Ubuntu=16.04
All of the following
ubuntu/linux-image-aws<4.4.0.1172.176
4.4.0.1172.176
Ubuntu Ubuntu=16.04
All of the following
ubuntu/linux-image-generic<4.4.0.257.263
4.4.0.257.263
Ubuntu Ubuntu=16.04
All of the following
ubuntu/linux-image-generic-lts-xenial<4.4.0.257.263
4.4.0.257.263
Ubuntu Ubuntu=16.04
All of the following
ubuntu/linux-image-kvm<4.4.0.1135.132
4.4.0.1135.132
Ubuntu Ubuntu=16.04
All of the following
ubuntu/linux-image-lowlatency<4.4.0.257.263
4.4.0.257.263
Ubuntu Ubuntu=16.04
All of the following
ubuntu/linux-image-lowlatency-lts-xenial<4.4.0.257.263
4.4.0.257.263
Ubuntu Ubuntu=16.04
All of the following
ubuntu/linux-image-virtual<4.4.0.257.263
4.4.0.257.263
Ubuntu Ubuntu=16.04
All of the following
ubuntu/linux-image-virtual-lts-xenial<4.4.0.257.263
4.4.0.257.263
Ubuntu Ubuntu=16.04
All of the following
ubuntu/linux-image-4.4.0-1134-aws<4.4.0-1134.140
4.4.0-1134.140
Ubuntu Ubuntu=14.04
All of the following
ubuntu/linux-image-4.4.0-257-generic<4.4.0-257.291~14.04.1
4.4.0-257.291~14.04.1
Ubuntu Ubuntu=14.04
All of the following
ubuntu/linux-image-4.4.0-257-lowlatency<4.4.0-257.291~14.04.1
4.4.0-257.291~14.04.1
Ubuntu Ubuntu=14.04
All of the following
ubuntu/linux-image-aws<4.4.0.1134.131
4.4.0.1134.131
Ubuntu Ubuntu=14.04
All of the following
ubuntu/linux-image-generic-lts-xenial<4.4.0.257.291~14.04.1
4.4.0.257.291~14.04.1
Ubuntu Ubuntu=14.04
All of the following
ubuntu/linux-image-lowlatency-lts-xenial<4.4.0.257.291~14.04.1
4.4.0.257.291~14.04.1
Ubuntu Ubuntu=14.04
All of the following
ubuntu/linux-image-virtual-lts-xenial<4.4.0.257.291~14.04.1
4.4.0.257.291~14.04.1
Ubuntu Ubuntu=14.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/linux-image-4.4.0-1135-kvm to a version that resolves this vulnerability.

    Fixed in 4.4.0-1135.145
  2. Upgrade

    Upgrade ubuntu/linux-image-4.4.0-1172-aws to a version that resolves this vulnerability.

    Fixed in 4.4.0-1172.187
  3. Upgrade

    Upgrade ubuntu/linux-image-4.4.0-257-generic to a version that resolves this vulnerability.

    Fixed in 4.4.0-257.291
  4. Upgrade

    Upgrade ubuntu/linux-image-4.4.0-257-lowlatency to a version that resolves this vulnerability.

    Fixed in 4.4.0-257.291
  5. Upgrade

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

    Fixed in 4.4.0.1172.176
  6. Upgrade

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

    Fixed in 4.4.0.257.263
  7. Upgrade

    Upgrade ubuntu/linux-image-generic-lts-xenial to a version that resolves this vulnerability.

    Fixed in 4.4.0.257.263
  8. Upgrade

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

    Fixed in 4.4.0.1135.132
  9. Upgrade

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

    Fixed in 4.4.0.257.263
  10. Upgrade

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

    Fixed in 4.4.0.257.263
  11. Upgrade

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

    Fixed in 4.4.0.257.263
  12. Upgrade

    Upgrade ubuntu/linux-image-virtual-lts-xenial to a version that resolves this vulnerability.

    Fixed in 4.4.0.257.263
  13. Upgrade

    Upgrade ubuntu/linux-image-4.4.0-1134-aws to a version that resolves this vulnerability.

    Fixed in 4.4.0-1134.140
  14. Upgrade

    Upgrade ubuntu/linux-image-4.4.0-257-generic to a version that resolves this vulnerability.

    Fixed in 4.4.0-257.291~14.04.1
  15. Upgrade

    Upgrade ubuntu/linux-image-4.4.0-257-lowlatency to a version that resolves this vulnerability.

    Fixed in 4.4.0-257.291~14.04.1
  16. Upgrade

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

    Fixed in 4.4.0.1134.131
  17. Upgrade

    Upgrade ubuntu/linux-image-generic-lts-xenial to a version that resolves this vulnerability.

    Fixed in 4.4.0.257.291~14.04.1
  18. Upgrade

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

    Fixed in 4.4.0.257.291~14.04.1
  19. Upgrade

    Upgrade ubuntu/linux-image-virtual-lts-xenial to a version that resolves this vulnerability.

    Fixed in 4.4.0.257.291~14.04.1
  20. Upgrade

    Upgrade Linux kernel to a version that resolves this vulnerability.

    Patch USN-6938-1

Event History

Jul 31, 2024
Advisory Published
via Ubuntu·12:00 AM

Child vulnerabilities

Contains the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of USN-6938-1?

USN-6938-1 is classified as a denial of service vulnerability in the Linux kernel.

2

How do I fix USN-6938-1?

To fix USN-6938-1, upgrade to a kernel version that is equal to or greater than the recommended remedial version for your specific package.

3

Which versions of Ubuntu are affected by USN-6938-1?

USN-6938-1 affects Ubuntu 16.04 and 14.04 systems running various kernel packages.

4

What type of attack does USN-6938-1 allow?

USN-6938-1 allows a local attacker to exploit the vulnerability to cause a denial of service, leading to a system crash.

5

Is there a workaround for USN-6938-1?

There are no recommended workarounds for USN-6938-1; the mitigation is to apply the kernel update.

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Resources

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