CVE-2026-89808

7.8 HIGH

Published 2026-09-16 · Updated 2026-09-17

AI risk analysis

Summary: The flaw allows an attacker to trigger an uninitialized memory access during the migration of virtual memory ranges, potentially leading to a denial of service or other vulnerabilities.
Exploitability: Exploitation requires specific conditions, such as a hole in the virtual memory range during migration, making it moderately difficult.
Blast radius: If exploited, it could result in a loss of VRAM resources, potentially impacting system stability and performance.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to the fixed version 6.1.17 or later.

dosmemorykernel

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix the case that vm range is hole at svm_migrate_copy_to_vram When migration vm range is hole at cpu side(MIGRATE_PFN_MIGRATE set + MIGRATE_PFN_VALID unset) driver still allocates device pages. There is no dma map of src pages and migration. j is 0 and svm_migrate_copy_memory_gart() will return an uninitialized r. That can trigger out_free_vram_pages to drop all VRAM just set up. Initialize r and only call the last svm_migrate_copy_memory_gart if j > 0. Current code postponed the last page to the final copy. This patch flushes on the last page when reach to the end of current drm_buddy_block; avoids another svm_migrate_copy_memory_gart.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Data: NVD (public domain). Analysis: local $0 model. Defensive use only.