CVE-2024-46689

5.5 · MEDIUM

Published Sep 13, 2024 linux CWE-787 EPSS 0.25% (17th pctl) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-46689 is a medium-severity vulnerability affecting linux linux_kernel. It was published on September 13, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

soc: qcom: cmd-db: Map shared memory as WC, not WB

Linux does not write into cmd-db region. This region of memory is write

protected by XPU. XPU may sometime falsely detect clean cache eviction

as "write" into the write protected region leading to secure interrupt

which causes an endless loop somewhere in Trust Zone.

The only reason it is working right now is because Qualcomm Hypervisor

maps the same region as Non-Cacheable memory in Stage 2 translation

tables. The issue manifests if we want to use another hypervisor (like

Xen or KVM), which does not know anything about those specific mappings.

Changing the mapping of cmd-db memory from MEMREMAP_WB to MEMREMAP_WT/WC

removes dependency on correct mappings in Stage 2 tables. This patch

fixes the issue by updating the mapping to MEMREMAP_WC.

I tested this on SA8155P with Xen.

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected Products

Vendor	Product	Versions	Status
linux	linux_kernel	>= 4.18, < 5.4.283	Affected

References

Ref git.kernel.org/stable/c/0ee9594c974368a17e85a431e9fe1c14fb65c278 Ref git.kernel.org/stable/c/62c2d63605ca25b5db78a347ed303c0a0a77d5b4 Ref git.kernel.org/stable/c/d9d48d70e922b272875cda60d2ada89291c840cf Ref git.kernel.org/stable/c/eaff392c1e34fb77cc61505a31b0191e5e46e271 Ref git.kernel.org/stable/c/ef80520be0ff78ae5ed44cb6eee1525e65bebe70 Ref git.kernel.org/stable/c/f5a5a5a0e95f36e2792d48e6e4b64e665eb01374 Ref git.kernel.org/stable/c/f9bb896eab221618927ae6a2f1d566567999839d Ref lists.debian.org/debian-lts-announce/2024/10/msg00003.html Ref lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Frequently Asked Questions

What is CVE-2024-46689?

CVE-2024-46689 is a medium-severity vulnerability affecting linux linux_kernel. It was published on September 13, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-46689?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-46689?

How can CyberStrike help with CVE-2024-46689?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-46689 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

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