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CVE-2026-93284

Linux: drm/pagemap: dma-unmap pages before handling migration errors

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
8.8High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.13%Chance of exploitation activity in the next 30 days, higher than 2% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in415f5a755cec5164b149037bf294e270b78d36c6Also 9e6372ec2a3990662ae0a67f56ac0aee19848d5bCVE List
Published24 Sep 2026Updated 19 Oct 2026CVE List

What fixes it

  • 415f5a755cec5164b149037bf294e270b78d36c6LinuxCVE List
  • 9e6372ec2a3990662ae0a67f56ac0aee19848d5bLinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 8

  • Linuxaffected: f86ad0ed620cb3c91ec7d5468e93ac68d727539d before e4331c6644db85bc6ceb470bd84bcf371b6dbfa6CVE List
  • Linuxaffected: f86ad0ed620cb3c91ec7d5468e93ac68d727539d before 415f5a755cec5164b149037bf294e270b78d36c6CVE List
  • Linuxaffected: f86ad0ed620cb3c91ec7d5468e93ac68d727539d before 9e6372ec2a3990662ae0a67f56ac0aee19848d5bCVE List
  • Linuxaffected: 6.17CVE List
  • Linuxunaffected: all versions before 6.17CVE List
  • Linuxunaffected: 6.18.53 through 6.18.*CVE List
  • Linuxunaffected: 7.2.9 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 3