drm/xe/oa: Zero OA buffer at allocation
ttm_bo_type_kernel BOs are not guaranteed to be zeroed on allocation and
may contain data from previously freed pages. Since the OA buffer is
mmap'able by userspace, this can expose stale kernel memory contents.
Streams opened with DRM_XE_OA_PROPERTY_OA_DISABLED allocate the OA
buffer without calling xe_oa_init_oa_buffer(). Zero the buffer at
allocation to prevent information disclosure through mmap.
The existing zeroing in xe_oa_init_oa_buffer() remains necessary for
zero report-id/timestamp detection on enable/re-enable.
(cherry picked from commit 126c4c5388f9311a390b9b254a835b0cf0f55331)
Analysis
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Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||
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| Linux | Linux | unaffected |
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| Linux | Linux | affected |
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No data.
No data.
No data available yet.
No solution or workaround provided in the CVE record.
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Wed, 28 Oct 2026 12:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-200 CWE-665 |
Wed, 28 Oct 2026 10:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | In the Linux kernel, the following vulnerability has been resolved: drm/xe/oa: Zero OA buffer at allocation ttm_bo_type_kernel BOs are not guaranteed to be zeroed on allocation and may contain data from previously freed pages. Since the OA buffer is mmap'able by userspace, this can expose stale kernel memory contents. Streams opened with DRM_XE_OA_PROPERTY_OA_DISABLED allocate the OA buffer without calling xe_oa_init_oa_buffer(). Zero the buffer at allocation to prevent information disclosure through mmap. The existing zeroing in xe_oa_init_oa_buffer() remains necessary for zero report-id/timestamp detection on enable/re-enable. (cherry picked from commit 126c4c5388f9311a390b9b254a835b0cf0f55331) | |
| Title | drm/xe/oa: Zero OA buffer at allocation | |
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
|
| References |
|
MITRE
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-10-28T10:36:01.473Z
Reserved: 2026-09-25T10:25:14.401Z
Link: CVE-2026-99208
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-10-28T11:17:42.170
Modified: 2026-10-28T11:17:42.170
Link: CVE-2026-99208
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-10-28T12:30:17Z