Linux Kernel DRM/xe/oa OA Buffer Not Zeroed Info Disclosure
CVE-2026-99208 Published on October 28, 2026
drm/xe/oa: Zero OA buffer at allocation
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)
Products Associated with CVE-2026-99208
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Affected Versions
Linux:- Version 392bf22238ff88506f410c464ba0c7a84e9de471 and below 21f41b6daf0dbe2cdaaf9f54af6e23fd3c9190b9 is affected.
- Version 392bf22238ff88506f410c464ba0c7a84e9de471 and below cd3e2918c247db631d88cdd704596d9d27e5513e is affected.
- Version 392bf22238ff88506f410c464ba0c7a84e9de471 and below fd8662823caa114a63f07222d2aa448f6ac5e864 is affected.
- Version 6.11 is affected.
- Before 6.11 is unaffected.
- Version 6.18.59, <= 6.18.* is unaffected.
- Version 7.2.13, <= 7.2.* is unaffected.
- Version 7.3, <= * is unaffected.