CVE-2026-43220

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-43220
In the Linux kernel, the following vulnerability has been resolved: iommu/amd: serialize sequence allocation under concurrent TLB invalidations With concurrent TLB invalidations, completion wait randomly gets timed out because cmd_sem_val was incremented outside the IOMMU spinlock, allowing CMD_COMPL_WAIT commands to be queued out of sequence and breaking the ordering assumption in wait_on_sem(). Move the cmd_sem_val increment under iommu->lock so completion sequence allocation is serialized with command queuing. And remove the unnecessary return.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/48caa7542a795c9679ec1bd1bc2592e05a7369a4 Patch
https://git.kernel.org/stable/c/5000ce7fcb31067566a1a1a2e5b5bbff93625242 Patch
https://git.kernel.org/stable/c/9e249c48412828e807afddc21527eb734dc9bd3d Patch
https://git.kernel.org/stable/c/d51bf43193b1e95dc4e34e540dc76e19def2ae5a
https://git.kernel.org/stable/c/fca7aa0264ae99e5ff287d0ced5af0b82b121c4f
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

17 May 2026, 16:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/d51bf43193b1e95dc4e34e540dc76e19def2ae5a -

14 May 2026, 15:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/fca7aa0264ae99e5ff287d0ced5af0b82b121c4f -

12 May 2026, 19:11

Type Values Removed Values Added
CWE NVD-CWE-noinfo
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux linux Kernel
Linux
References () https://git.kernel.org/stable/c/48caa7542a795c9679ec1bd1bc2592e05a7369a4 - () https://git.kernel.org/stable/c/48caa7542a795c9679ec1bd1bc2592e05a7369a4 - Patch
References () https://git.kernel.org/stable/c/5000ce7fcb31067566a1a1a2e5b5bbff93625242 - () https://git.kernel.org/stable/c/5000ce7fcb31067566a1a1a2e5b5bbff93625242 - Patch
References () https://git.kernel.org/stable/c/9e249c48412828e807afddc21527eb734dc9bd3d - () https://git.kernel.org/stable/c/9e249c48412828e807afddc21527eb734dc9bd3d - Patch
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

06 May 2026, 12:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-06 12:16

Updated : 2026-05-17 16:16

NVD link : CVE-2026-43220

Mitre link : CVE-2026-43220

CVE.ORG link : CVE-2026-43220

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo