CVE - CVE-2024-46689

CVE-ID
CVE-2024-46689	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/0ee9594c974368a17e85a431e9fe1c14fb65c278 URL:https://git.kernel.org/stable/c/0ee9594c974368a17e85a431e9fe1c14fb65c278 MISC:https://git.kernel.org/stable/c/62c2d63605ca25b5db78a347ed303c0a0a77d5b4 URL:https://git.kernel.org/stable/c/62c2d63605ca25b5db78a347ed303c0a0a77d5b4 MISC:https://git.kernel.org/stable/c/d9d48d70e922b272875cda60d2ada89291c840cf URL:https://git.kernel.org/stable/c/d9d48d70e922b272875cda60d2ada89291c840cf MISC:https://git.kernel.org/stable/c/eaff392c1e34fb77cc61505a31b0191e5e46e271 URL:https://git.kernel.org/stable/c/eaff392c1e34fb77cc61505a31b0191e5e46e271 MISC:https://git.kernel.org/stable/c/ef80520be0ff78ae5ed44cb6eee1525e65bebe70 URL:https://git.kernel.org/stable/c/ef80520be0ff78ae5ed44cb6eee1525e65bebe70 MISC:https://git.kernel.org/stable/c/f5a5a5a0e95f36e2792d48e6e4b64e665eb01374 URL:https://git.kernel.org/stable/c/f5a5a5a0e95f36e2792d48e6e4b64e665eb01374 MISC:https://git.kernel.org/stable/c/f9bb896eab221618927ae6a2f1d566567999839d URL:https://git.kernel.org/stable/c/f9bb896eab221618927ae6a2f1d566567999839d
Assigning CNA
kernel.org
Date Record Created
20240911	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240911)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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