CVE-2026-43220 : faille moyenne linux linux kernel (CVSS 5.5)

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.

Sévérité

Moyenne (CVSS 5.5)

Vecteur CVSS

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

Exploitation active

Non signalée par la CISA

Publication

6 mai 2026

Dernière mise à jour

17 juin 2026

• linux linux kernel

• Fiche CVE-2026-43220 sur le NVD (NIST)
• git.kernel.org/stable/c/48caa7542a795c9679ec1bd1bc2592e05a736…
• git.kernel.org/stable/c/5000ce7fcb31067566a1a1a2e5b5bbff93625…
• git.kernel.org/stable/c/9e249c48412828e807afddc21527eb734dc9b…
• git.kernel.org/stable/c/d51bf43193b1e95dc4e34e540dc76e19def2a…
• git.kernel.org/stable/c/fca7aa0264ae99e5ff287d0ced5af0b82b121…