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Vulnerability Details :

CVE-2026-46309

Summary
Assigner-Linux
Assigner Org ID-416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published At-08 Jun, 2026 | 15:50
Updated At-08 Jun, 2026 | 15:50
Rejected At-
Credits

drm/xe/uapi: Reject coh_none PAT index for CPU cached memory in madvise

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)

Vendors
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Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
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Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:Linux
Assigner Org ID:416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published At:08 Jun, 2026 | 15:50
Updated At:08 Jun, 2026 | 15:50
Rejected At:
▼CVE Numbering Authority (CNA)
drm/xe/uapi: Reject coh_none PAT index for CPU cached memory in madvise

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)

Affected Products
Vendor
Linux Kernel Organization, IncLinux
Product
Linux
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Program Files
  • drivers/gpu/drm/xe/xe_vm_madvise.c
Default Status
unaffected
Versions
Affected
  • From ada7486c5668db542a7d361268df931aca5b726a before 87f9b1528e1ffc1da3615d552c9a06aba5e20b00 (git)
  • From ada7486c5668db542a7d361268df931aca5b726a before fea04cf6f2345bc50f15b6638906c35962b89424 (git)
  • From ada7486c5668db542a7d361268df931aca5b726a before 4e5591c2fc1b30f4ea5e2eab4c3a695acc404e39 (git)
Vendor
Linux Kernel Organization, IncLinux
Product
Linux
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Program Files
  • drivers/gpu/drm/xe/xe_vm_madvise.c
Default Status
affected
Versions
Affected
  • 6.18
Unaffected
  • From 0 before 6.18 (semver)
  • From 6.18.32 through 6.18.* (semver)
  • From 7.0.9 through 7.0.* (semver)
  • From 7.1-rc2 through * (original_commit_for_fix)
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
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Configurations
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Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://git.kernel.org/stable/c/87f9b1528e1ffc1da3615d552c9a06aba5e20b00
N/A
https://git.kernel.org/stable/c/fea04cf6f2345bc50f15b6638906c35962b89424
N/A
https://git.kernel.org/stable/c/4e5591c2fc1b30f4ea5e2eab4c3a695acc404e39
N/A
Hyperlink: https://git.kernel.org/stable/c/87f9b1528e1ffc1da3615d552c9a06aba5e20b00
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/fea04cf6f2345bc50f15b6638906c35962b89424
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/4e5591c2fc1b30f4ea5e2eab4c3a695acc404e39
Resource: N/A
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published At:08 Jun, 2026 | 17:16
Updated At:08 Jun, 2026 | 17:16

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)

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
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Vendor Statements
References
HyperlinkSourceResource
https://git.kernel.org/stable/c/4e5591c2fc1b30f4ea5e2eab4c3a695acc404e39416baaa9-dc9f-4396-8d5f-8c081fb06d67
N/A
https://git.kernel.org/stable/c/87f9b1528e1ffc1da3615d552c9a06aba5e20b00416baaa9-dc9f-4396-8d5f-8c081fb06d67
N/A
https://git.kernel.org/stable/c/fea04cf6f2345bc50f15b6638906c35962b89424416baaa9-dc9f-4396-8d5f-8c081fb06d67
N/A
Hyperlink: https://git.kernel.org/stable/c/4e5591c2fc1b30f4ea5e2eab4c3a695acc404e39
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/87f9b1528e1ffc1da3615d552c9a06aba5e20b00
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/fea04cf6f2345bc50f15b6638906c35962b89424
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Resource: N/A

Change History

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