CVE-2024-46689

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  3. CVE-2024-46689

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

I

n 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
Link Resource
https://git.kernel.org/stable/c/0ee9594c974368a17e85a431e9fe1c14fb65c278 Patch
https://git.kernel.org/stable/c/62c2d63605ca25b5db78a347ed303c0a0a77d5b4 Patch
https://git.kernel.org/stable/c/d9d48d70e922b272875cda60d2ada89291c840cf Patch
https://git.kernel.org/stable/c/eaff392c1e34fb77cc61505a31b0191e5e46e271 Patch
https://git.kernel.org/stable/c/ef80520be0ff78ae5ed44cb6eee1525e65bebe70 Patch
https://git.kernel.org/stable/c/f5a5a5a0e95f36e2792d48e6e4b64e665eb01374 Patch
https://git.kernel.org/stable/c/f9bb896eab221618927ae6a2f1d566567999839d Patch
https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:*
History

03 Nov 2025, 23:15

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html -
  • () https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html -

20 Sep 2024, 15:52

Type Values Removed Values Added
First Time Linux
Linux linux Kernel
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CPE cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*
CWE CWE-787
References () https://git.kernel.org/stable/c/0ee9594c974368a17e85a431e9fe1c14fb65c278 - () https://git.kernel.org/stable/c/0ee9594c974368a17e85a431e9fe1c14fb65c278 - Patch
References () https://git.kernel.org/stable/c/62c2d63605ca25b5db78a347ed303c0a0a77d5b4 - () https://git.kernel.org/stable/c/62c2d63605ca25b5db78a347ed303c0a0a77d5b4 - Patch
References () https://git.kernel.org/stable/c/d9d48d70e922b272875cda60d2ada89291c840cf - () https://git.kernel.org/stable/c/d9d48d70e922b272875cda60d2ada89291c840cf - Patch
References () https://git.kernel.org/stable/c/eaff392c1e34fb77cc61505a31b0191e5e46e271 - () https://git.kernel.org/stable/c/eaff392c1e34fb77cc61505a31b0191e5e46e271 - Patch
References () https://git.kernel.org/stable/c/ef80520be0ff78ae5ed44cb6eee1525e65bebe70 - () https://git.kernel.org/stable/c/ef80520be0ff78ae5ed44cb6eee1525e65bebe70 - Patch
References () https://git.kernel.org/stable/c/f5a5a5a0e95f36e2792d48e6e4b64e665eb01374 - () https://git.kernel.org/stable/c/f5a5a5a0e95f36e2792d48e6e4b64e665eb01374 - Patch
References () https://git.kernel.org/stable/c/f9bb896eab221618927ae6a2f1d566567999839d - () https://git.kernel.org/stable/c/f9bb896eab221618927ae6a2f1d566567999839d - Patch

13 Sep 2024, 14:06

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: soc: qcom: cmd-db: Asignar memoria compartida como WC, no como WB Linux no escribe en la región cmd-db. Esta región de memoria está protegida contra escritura por XPU. En ocasiones, XPU puede detectar erróneamente la expulsión de caché limpia como "escritura" en la región protegida contra escritura, lo que genera una interrupción segura que provoca un bucle sin fin en algún lugar de la Zona de confianza. La única razón por la que funciona en este momento es porque Qualcomm Hypervisor asigna la misma región que la memoria no almacenable en caché en las tablas de traducción de la Etapa 2. El problema se manifiesta si queremos usar otro hipervisor (como Xen o KVM), que no sabe nada sobre esas asignaciones específicas. Cambiar la asignación de memoria cmd-db de MEMREMAP_WB a MEMREMAP_WT/WC elimina la dependencia de las asignaciones correctas en las tablas de la Etapa 2. Este parche corrige el problema actualizando la asignación a MEMREMAP_WC. Probé esto en SA8155P con Xen.

13 Sep 2024, 06:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-09-13 06:15

Updated : 2025-11-03 23:15

NVD link : CVE-2024-46689

Mitre link : CVE-2024-46689

CVE.ORG link : CVE-2024-46689

JSON object : View

Products Affected

linux

CWE
CWE-787

Out-of-bounds Write