In the Linux kernel, the following vulnerability has been resolved: drm/i915: mark requests for GuC virtual engines to avoid use-after-free References to i915_requests may be trapped by userspace inside a sync_file or dmabuf (dma-resv) and held indefinitely across different proceses. To counter-act the memory leaks, we try to not to keep references from the request past their completion. On the other side on fence release we need to know if rq->engine is valid and points to hw engine (true for non-virtual requests). To make it possible extra bit has been added to rq->execution_mask, for marking virtual engines. (cherry picked from commit 280410677af763f3871b93e794a199cfcf6fb580)
Upstream advisory: https://lore.kernel.org/linux-cve-announce/2025100447-CVE-2023-53552-5ba9@gregkh/T
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2026:0760 https://access.redhat.com/errata/RHSA-2026:0760
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2026:0759 https://access.redhat.com/errata/RHSA-2026:0759
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Via RHSA-2026:1443 https://access.redhat.com/errata/RHSA-2026:1443
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat Enterprise Linux 8.8 Telecommunications Update Service Via RHSA-2026:1445 https://access.redhat.com/errata/RHSA-2026:1445
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Via RHSA-2026:1441 https://access.redhat.com/errata/RHSA-2026:1441