CVE-2026-74721 - accel/amxdna: Fix page-insertion errors in amdxdna_insert_pages()
Brief
CVE ID : CVE-2026-74721
Published : Aug. 22, 2026, 4:16 p. m.
- 4 hours, 54 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved:
accel/amxdna: Fix page-insertion errors in amdxdna_insert_pages()
Two error paths in amdxdna_insert_pages() called vma-vm_ops-close(vma) before returning an error code to the caller. This is incorrect: amdxdna_gem_obj_mmap() registers an HMM interval notifier before calling amdxdna_insert_pages(), and on a hard error it jumps to hmm_unreg to undo that registration.
Calling vm_ops-close() manually — which drops the shmem pages_pin_count and the GEM object reference that backs the VMA — before the mmap syscall has even returned causes those resources to be released while the VMA is still alive.