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In the Linux kernel, the following vulnerability has been resolved:
drm/xe/uapi: Reject coh_none PAT index for CPU cached memory in madvise
Add validation in xe_vm_madvise_ioctl() to reject PAT indices with
XE_COH_NONE coherency mode when applied to CPU cached memory.
Using coh_none with CPU cached buffers is a security issue. When the
kernel clears pages before reallocation, the clear operation stays in
CPU cache (dirty). GPU with coh_none can bypass CPU caches and read
stale sensitive data directly from DRAM, potentially leaking data from
previously freed pages of other processes.
This aligns with the existing validation in vm_bind path
(xe_vm_bind_ioctl_validate_bo).
v2(Matthew brost)
- Add fixes
- Move one debug print to better place
v3(Matthew Auld)
- Should be drm/xe/uapi
- More Cc
v4(Shuicheng Lin)
- Fix kmem leak issues by the way
v5
- Remove kmem leak because it has been merged by another patch
v6
- Remove the fix which is not related to current fix
v7
- No change
v8
- Rebase
v9
- Limit the restrictions to iGPU
v10
- No change
(cherry picked from commit 016ccdb674b8c899940b3944952c96a6a490d10a)
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Title: Linux, Description: En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:
drm/xe/uapi: Rechazar el índice PAT coh_none para memoria caché de CPU en madvise
Añadir validación en xe_vm_madvise_ioctl() para rechazar índices PAT con modo de coherencia XE_COH_NONE cuando se aplica a memoria caché de CPU.
Usar coh_none con búferes en caché de CPU es un problema de seguridad. Cuando el kernel borra páginas antes de la reasignación, la operación de borrado permanece en la caché de la CPU (sucia). La GPU con coh_none puede omitir las cachés de la CPU y leer datos sensibles obsoletos directamente de la DRAM, potencialmente filtrando datos de páginas previamente liberadas de otros procesos.
Esto se alinea con la validación existente en la ruta vm_bind (xe_vm_bind_ioctl_validate_bo).
v2(Matthew brost)
- Añadir correcciones
- Mover una impresión de depuración a un lugar mejor
v3(Matthew Auld)
- Debería ser drm/xe/uapi
- Más Cc
v4(Shuicheng Lin)
- Corregir problemas de fuga de kmem de paso
v5
- Eliminar la fuga de kmem porque ha sido fusionada por otro parche
v6
- Eliminar la corrección que no está relacionada con la corrección actual
v7
- Sin cambios
v8
- Rebase
v9
- Limitar las restricciones a la iGPU
v10
- Sin cambios
(seleccionado de la confirmación 016ccdb674b8c899940b3944952c96a6a490d10a)
CVE Modified by redhat-SADP7/14/2026 10:22:14 PM
Action
Type
Old Value
New Value
Changed
Affected
[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux:10"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux:9"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 6","defaultStatus":"unaffected","cpes":["cpe:/o:redhat:enterprise_linux:6"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 7","defaultStatus":"unaffected","cpes":["cpe:/o:redhat:enterprise_linux:7"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","defaultStatus":"unaffected","cpes":["cpe:/o:redhat:enterprise_linux:8"]}]
[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"kernel","cpes":["cpe:/o:redhat:enterprise_linux:10"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 6","defaultStatus":"unaffected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"kernel","cpes":["cpe:/o:redhat:enterprise_linux:6"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 7","defaultStatus":"unaffected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"kernel","cpes":["cpe:/o:redhat:enterprise_linux:7"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 7","defaultStatus":"unaffected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"kernel-rt","cpes":["cpe:/o:redhat:enterprise_linux:7"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","defaultStatus":"unaffected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"kernel","cpes":["cpe:/o:redhat:enterprise_linux:8"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","defaultStatus":"unaffected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"kernel-rt","cpes":["cpe:/o:redhat:enterprise_linux:8"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"kernel","cpes":["cpe:/o:redhat:enterprise_linux:9"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","packageName":"kernel-rt","cpes":["cpe:/o:redhat:enterprise_linux:9"]}]
Initial Analysis by NIST7/08/2026 10:52:28 AM
Action
Type
Old Value
New Value
Added
CVSS V3.1
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Added
CWE
CWE-401
Added
CPE Configuration
OR
*cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.18 up to (excluding) 6.18.32
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.9
[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux:10"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux:9"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 6","defaultStatus":"unaffected","cpes":["cpe:/o:redhat:enterprise_linux:6"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 7","defaultStatus":"unaffected","cpes":["cpe:/o:redhat:enterprise_linux:7"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","defaultStatus":"unaffected","cpes":["cpe:/o:redhat:enterprise_linux:8"]}]
New CVE Received from kernel.org6/08/2026 1:16:49 PM
Action
Type
Old Value
New Value
Added
Description
In the Linux kernel, the following vulnerability has been resolved:
drm/xe/uapi: Reject coh_none PAT index for CPU cached memory in madvise
Add validation in xe_vm_madvise_ioctl() to reject PAT indices with
XE_COH_NONE coherency mode when applied to CPU cached memory.
Using coh_none with CPU cached buffers is a security issue. When the
kernel clears pages before reallocation, the clear operation stays in
CPU cache (dirty). GPU with coh_none can bypass CPU caches and read
stale sensitive data directly from DRAM, potentially leaking data from
previously freed pages of other processes.
This aligns with the existing validation in vm_bind path
(xe_vm_bind_ioctl_validate_bo).
v2(Matthew brost)
- Add fixes
- Move one debug print to better place
v3(Matthew Auld)
- Should be drm/xe/uapi
- More Cc
v4(Shuicheng Lin)
- Fix kmem leak issues by the way
v5
- Remove kmem leak because it has been merged by another patch
v6
- Remove the fix which is not related to current fix
v7
- No change
v8
- Rebase
v9
- Limit the restrictions to iGPU
v10
- No change
(cherry picked from commit 016ccdb674b8c899940b3944952c96a6a490d10a)
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