- Vulnerability/
- USN-2421-1
USN-2421-1: Linux kernel vulnerabilities
First published: Tue Nov 25 2014(Updated: )
A flaw was discovered in how the Linux kernel's KVM (Kernel Virtual Machine) subsystem handles the CR4 control register at VM entry on Intel processors. A local host OS user can exploit this to cause a denial of service (kill arbitrary processes, or system disruption) by leveraging /dev/kvm access. (CVE-2014-3690) Don Bailey discovered a flaw in the LZO decompress algorithm used by the Linux kernel. An attacker could exploit this flaw to cause a denial of service (memory corruption or OOPS). (CVE-2014-4608) Andy Lutomirski discovered that the Linux kernel was not checking the CAP_SYS_ADMIN when remounting filesystems to read-only. A local user could exploit this flaw to cause a denial of service (loss of writability). (CVE-2014-7975)
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| ubuntu/linux-image-3.16.0-25-powerpc-smp | <3.16.0-25.33 | 3.16.0-25.33 |
| Ubuntu 22.04 LTS | =14.10 | |
| All of | ||
| ubuntu/linux-image-3.16.0-25-powerpc-e500mc | <3.16.0-25.33 | 3.16.0-25.33 |
| Ubuntu 22.04 LTS | =14.10 | |
| All of | ||
| ubuntu/linux-image-3.16.0-25-generic-lpae | <3.16.0-25.33 | 3.16.0-25.33 |
| Ubuntu 22.04 LTS | =14.10 | |
| All of | ||
| ubuntu/linux-image-3.16.0-25-generic | <3.16.0-25.33 | 3.16.0-25.33 |
| Ubuntu 22.04 LTS | =14.10 | |
| All of | ||
| ubuntu/linux-image-3.16.0-25-powerpc64-smp | <3.16.0-25.33 | 3.16.0-25.33 |
| Ubuntu 22.04 LTS | =14.10 | |
| All of | ||
| ubuntu/linux-image-3.16.0-25-lowlatency | <3.16.0-25.33 | 3.16.0-25.33 |
| Ubuntu 22.04 LTS | =14.10 | |
| All of | ||
| ubuntu/linux-image-3.16.0-25-powerpc64-emb | <3.16.0-25.33 | 3.16.0-25.33 |
| Ubuntu 22.04 LTS | =14.10 |
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Reference Links
- https://ubuntu.com/security/CVE-2014-3690
- https://ubuntu.com/security/CVE-2014-4608
- https://ubuntu.com/security/CVE-2014-7975
- https://ubuntu.com/security/notices/USN-2419-1
- https://ubuntu.com/security/notices/USN-2417-1
- https://ubuntu.com/security/notices/USN-2420-1
- https://ubuntu.com/security/notices/USN-2418-1
- https://ubuntu.com/security/notices/USN-2416-1
- https://ubuntu.com/security/notices/USN-2286-1
- https://ubuntu.com/security/notices/USN-2289-1
- https://ubuntu.com/security/notices/USN-2415-1
- https://launchpad.net/ubuntu/+source/linux/3.16.0-25.33
- https://ubuntu.com/security/notices/USN-2421-1 (Advisory)
Child vulnerabilities
(Contains the following vulnerabilities)
Frequently Asked Questions
What is the severity of USN-2421-1?
The severity of USN-2421-1 is categorized as high due to its potential to cause denial of service.
How do I fix USN-2421-1?
To fix USN-2421-1, upgrade to the linux-image package version 3.16.0-25.33 or later.
What systems are affected by USN-2421-1?
USN-2421-1 affects various Ubuntu 14.10 installations running specific versions of the linux-image kernel.
Can USN-2421-1 be exploited remotely?
No, USN-2421-1 can only be exploited by a local user on the host OS.
Is there a known workaround for USN-2421-1?
There are no known workarounds for USN-2421-1; applying the patch is the recommended solution.
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