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)
CVSS Details
- CVSS 3.1 Base Score: 7
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade kernel-64k-debugUpgrade kernel-debug-modules-extraUpgrade kernel-64k-debug-modules-coreUpgrade kernel-64k-debug-coreUpgrade kernel-64k-modules-extraUpgrade kernel-abi-stablelistsUpgrade kernel-64kUpgrade kernel-64k-modulesUpgrade kernel-64k-debug-modules-extraUpgrade kernel-64k-coreUpgrade kernelUpgrade kernel-debug-coreUpgrade kernel-debugUpgrade kernel-64k-debug-modulesUpgrade kernel-64k-modules-coreUpgrade kernel-coreUpgrade kernel-debug-modulesUpgrade kernel-debug-modules-core | Oct 15, 2026 | Oct 12, 2026 |
| Redhat_linux | — | Upgrade kernel-rtNo solution existsUpgrade kernel | Jul 17, 2026 | Jun 8, 2026 |
| Rocky_linux | — | Upgrade kernel-zfcpdump-devel-matchedUpgrade python3-perf-debuginfoUpgrade rvUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-debug-modulesUpgrade kernel-rtUpgrade kernel-zfcpdump-coreUpgrade perfUpgrade kernel-uki-virt-addonsUpgrade kernel-rt-debug-coreUpgrade kernel-rt-debug-debuginfoUpgrade kernel-zfcpdump-modulesUpgrade kernel-rt-develUpgrade kernel-rt-modules-extraUpgrade kernel-debug-devel-matchedUpgrade kernel-rt-debuginfoUpgrade kernel-tools-libsUpgrade kernel-rt-modulesUpgrade libperf-debuginfoUpgrade kernel-toolsUpgrade kernel-debug-modules-extraUpgrade kernel-tools-libs-develUpgrade kernel-debuginfo-common-s390xUpgrade kernel-rt-modules-coreUpgrade kernel-rt-debug-modules-coreUpgrade kernel-rt-debug-modulesUpgrade kernel-debug-uki-virtUpgrade kernel-rt-debugUpgrade python3-perfUpgrade kernel-coreUpgrade kernel-tools-debuginfoUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-modules-extraUpgrade kernel-zfcpdump-debuginfoUpgrade perf-debuginfoUpgrade libperfUpgrade kernel-debug-debuginfoUpgrade kernel-debug-modules-coreUpgrade kernel-rt-coreUpgrade kernel-modules-coreUpgrade kernel-develUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-rt-debug-develUpgrade kernel-debug-develUpgrade kernel-debug-coreUpgrade kernel-debugUpgrade kernel-zfcpdumpUpgrade kernel-modulesUpgrade kernel-devel-matchedUpgrade rtlaUpgrade kernel-uki-virtUpgrade kernelUpgrade kernel-rt-debug-modules-extraUpgrade kernel-zfcpdump-develUpgrade kernel-debuginfo | Oct 16, 2026 | Oct 14, 2026 |
| Ubuntu | — | Upgrade linux-image-generic-64k-hwe-26.04Upgrade linux-image-generic-hwe-26.04Upgrade linux-image-7.0.0-1008-oracle-64kUpgrade linux-image-7.0.0-2016-nvidia-bos-64kUpgrade linux-image-7.0.0-1008-oracleUpgrade linux-image-awsUpgrade linux-image-gke-64k-hwe-26.04Upgrade linux-image-raspi-realtimeUpgrade linux-image-realtime-64kUpgrade linux-image-aws-7.0Upgrade linux-image-7.0.0-1003-gkeUpgrade linux-image-virtual-7.0Upgrade linux-image-7.0.0-1011-oracle-64kUpgrade linux-image-7.0.0-28-generic-64kUpgrade linux-image-7.0.0-1009-azure-fdeUpgrade linux-image-azure-7.0Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-realtimeUpgrade linux-image-generic-7.0Upgrade linux-image-realtime-64k-7.0Upgrade linux-image-gkeUpgrade linux-image-raspi-7.0Upgrade linux-image-oem-24.04bUpgrade linux-image-oracleUpgrade linux-image-gke-hwe-26.04Upgrade linux-image-generic-hwe-24.04Upgrade linux-image-7.0.0-1003-gke-64kUpgrade linux-image-gcp-64k-7.0Upgrade linux-image-7.0.0-1014-azureUpgrade linux-image-7.0.0-28-realtime-64kUpgrade linux-image-gcpUpgrade linux-image-oem-24.04Upgrade linux-image-oem-24.04cUpgrade linux-image-gcp-7.0Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-aws-64kUpgrade linux-image-oracle-64k-7.0Upgrade linux-image-7.0.0-1008-gcp-64kUpgrade linux-image-7.0.0-1015-raspi-realtimeUpgrade linux-image-oem-24.04dUpgrade linux-image-7.0.0-28-genericUpgrade linux-image-virtualUpgrade linux-image-raspi-realtime-7.0Upgrade linux-image-7.0.0-28-realtimeUpgrade linux-image-realtime-7.0Upgrade linux-image-7.0.0-1011-gcp-64kUpgrade linux-image-genericUpgrade linux-image-7.0.0-1011-oracleUpgrade linux-image-7.0.0-1009-awsUpgrade linux-image-7.0.0-1008-gcpUpgrade linux-image-aws-64k-7.0Upgrade linux-image-7.0.0-1016-nvidiaUpgrade linux-image-nvidia-bos-64kUpgrade linux-image-7.0.0-1009-oemUpgrade linux-image-7.0.0-1010-ibmUpgrade linux-image-raspiUpgrade linux-image-oracle-64kUpgrade linux-image-nvidia-7.0Upgrade linux-image-realtime-hwe-26.04Upgrade linux-image-oem-24.04aUpgrade linux-image-7.0.0-1011-gcpUpgrade linux-image-7.0.0-1010-azureUpgrade linux-image-gke-64k-7.0Upgrade linux-image-generic-64k-7.0Upgrade linux-image-7.0.0-1016-nvidia-64kUpgrade linux-image-oem-26.04Upgrade linux-image-nvidia-bosUpgrade linux-image-gcp-64kUpgrade linux-image-gke-64kUpgrade linux-image-gke-7.0Upgrade linux-image-oem-7.0Upgrade linux-image-nvidiaUpgrade linux-image-7.0.0-1009-aws-64kUpgrade linux-image-realtime-64k-hwe-26.04Upgrade linux-image-nvidia-bos-7.0Upgrade linux-image-oem-26.04aUpgrade linux-image-nvidia-64k-hwe-26.04Upgrade linux-image-ibmUpgrade linux-image-azure-fdeUpgrade linux-image-azureUpgrade linux-image-7.0.0-1015-raspiUpgrade linux-image-nvidia-64kUpgrade linux-image-7.0.0-2016-nvidia-bosUpgrade linux-image-virtual-hwe-26.04Upgrade linux-image-nvidia-hwe-26.04Upgrade linux-image-nvidia-bos-64k-7.0Upgrade linux-image-oracle-7.0Upgrade linux-image-nvidia-64k-7.0Upgrade linux-image-ibm-7.0Upgrade linux-image-generic-64kUpgrade linux-image-azure-fde-7.0 | Jul 20, 2026 | Jun 8, 2026 |
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