🛡️ CVE-2024-46689 — kernel

🟡 CVSS 5.5 — Medium ✅ No Known Exploit NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

CVE-2024-46689 is recorded against 2 packages.

  • kernel (from 6.7.0 up to 6.10.8)
  • linux-kernel

Timeline and source

Published on 13 September 2024 and last revised on 15 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
lists.debian.org (Web)
lists.debian.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2024-46689 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Medium
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2024-09-13
Updated 2026-08-12
Modified 2026-07-15

Affected Packages

Software From version Fixed in
kernel 6.7.0 6.10.8
linux-kernel — —

References

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