CVE-2026-93284

8.8 HIGH

Published 2026-09-24 · Updated 2026-09-25

AI risk analysis

Summary: The flaw lies in the Linux kernel's DRM pagemap handling, where DMA unmapping pages are not properly managed, leading to potential memory corruption or privilege escalation if exploited.
Exploitability: Exploitation requires specific timing and kernel context, making it moderately difficult. The vulnerability arises when the migration cleanup occurs before DMA unmapping.
Blast radius: If exploited, this could lead to severe system instability, data corruption, or privilege escalation, impacting the integrity and security of the system.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to the specific version 5.19.1 or later, as published in the advisory.

kernelmemoryprivilege-escalation

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/pagemap: dma-unmap pages before handling migration errors drm_pagemap_migrate_unmap_pages() relies on the pages array to determine which pages require DMA unmapping. However, drm_pagemap_migration_unlock_put_pages() clears the array as part of its cleanup, leaving drm_pagemap_migrate_unmap_pages() with no valid page information if it is called afterward. Call drm_pagemap_migrate_unmap_pages() before drm_pagemap_migration_unlock_put_pages() so the pages array remains valid during DMA unmapping.

CVSS vector

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

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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