CVE-2025-21939

In the Linux kernel, the following vulnerability has been resolved: drm/xe/hmm: Don't dereference struct page pointers without notifier lock The pnfs that we obtain from hmmrangefault point to pages that we don't have a reference on, and the guarantee that they are still in the cpu page-tables is...

DEBIAN-CVE-2025-21939

In the Linux kernel, the following vulnerability has been resolved: drm/xe/hmm: Don't dereference struct page pointers without notifier lock The pnfs that we obtain from hmmrangefault point to pages that we don't have a reference on, and the guarantee that they are still in the cpu page-tables is...

CVE-2025-21939

CVE-2025-21939 affects the Linux kernel DRM: XEHmm code path. The root cause is dereference of struct page pointers obtained from hmm_range_fault() without holding the notifier lock (and with an invalid/unstable seqno), risking access to pages not owned by the kernel during sg-table construction....