CVE-2025-71130

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

drm/i915/gem: Zero-initialize the eb.vma array in i915_gem_do_execbuffer

Initialize the eb.vma array with values of 0 when the eb structure is

first set up. In particular, this sets the eb->vma[i].vma pointers to

NULL, simplifying cleanup and getting rid of the bug described below.

During the execution of eb_lookup_vmas(), the eb->vma array is

successively filled up with struct eb_vma objects. This process includes

calling eb_add_vma(), which might fail; however, even in the event of

failure, eb->vma[i].vma is set for the currently processed buffer.

If eb_add_vma() fails, eb_lookup_vmas() returns with an error, which

prompts a call to eb_release_vmas() to clean up the mess. Since

eb_lookup_vmas() might fail during processing any (possibly not first)

buffer, eb_release_vmas() checks whether a buffer's vma is NULL to know

at what point did the lookup function fail.

In eb_lookup_vmas(), eb->vma[i].vma is set to NULL

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References