In the world of Linux operating systems, security is a top priority. The Linux kernel is the backbone of the system, and ensuring its integrity and safety is crucial. In this post, we will discuss a recently resolved vulnerability in the Linux kernel that affected the frequency table arrays. The vulnerability is identified as CVE-2024-26967.

The Vulnerability

The vulnerability in question is related to the clk: qcom: camcc-sc828xp component of the kernel. Specifically, it involves the termination of frequency table arrays. In some instances, the arrays were not terminated correctly with an empty element. This can lead to possible out-of-bound access when the table is traversed by functions like qcom_find_freq() or qcom_find_freq_floor(). Out-of-bound access can potentially lead to system crashes, denial of service, or even privilege escalation.

The Fix

The Linux kernel developers addressed this issue by adding an empty element to the end of frequency table arrays where it was missing. This ensures that the arrays are properly terminated and prevents any possible out-of-bound access. The fix for this vulnerability has been implemented in recent Linux kernel versions, and is highly recommended.

Code Snippet

Below is a code snippet from the Linux kernel source that provides the fix for this vulnerability.

...
{ P_GPLL_OUT_EVEN_DIV5_DIV_CDIV3,  GATEFLAGS },
{ P_GPLL_OUT_EVEN_DIV5_DIV4,       GATEFLAGS },
{ },
};
...

By simply adding an empty element ({ },) at the end of the array, the vulnerability is mitigated.

Original References

For more information about this vulnerability, its implications, and the relevant patches, please refer to the following links:

- Linux kernel source commit

- Kernel.org announcement

- CVE-2024-26967 Vulnerability Database Entry

Exploit Details

At this time, there are no known exploits specifically targeting CVE-2024-26967 in the wild. However, it is essential for system administrators and developers to apply the necessary kernel updates or patches as soon as possible to mitigate the risk of exploitation. Ignoring this and other kernel vulnerabilities can leave systems exposed to potential threats.

Conclusion

Keeping operating systems secure is an ongoing process, and the Linux kernel development community is dedicated to staying ahead of potential threats. Addressing vulnerabilities like CVE-2024-26967 is critical to ensuring the safety and stability of Linux-based systems. Stay informed about the latest Linux kernel updates and vulnerabilities, and keep your systems up-to-date to minimize exposure to potential attacks.

Timeline

Published on: 05/01/2024 06:15:13 UTC
Last modified on: 12/23/2024 13:53:27 UTC