CVE-2026-99208 drm/xe/oa: Zero OA buffer at allocation
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-99208?
CVE-2026-99208 is a vulnerability in Linux, published on 28 Oct 2026.
Official 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)
Which versions are affected by CVE-2026-99208?
How do I fix CVE-2026-99208?
Upgrade to a fixed version.
Is CVE-2026-99208 being exploited?
There is no known exploitation of CVE-2026-99208 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-99208, DEBIAN-CVE-2026-99208, GHSA-j8g3-c5f3-w4qh, UBUNTU-CVE-2026-99208.