Medium severity5.5NVD Advisory· Published May 6, 2026· Updated Jun 17, 2026
CVE-2026-43220
CVE-2026-43220
Description
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.
AI Insight
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Affected products
18- osv-coords16 versionspkg:apk/chainguard/linux-aws-6.12pkg:apk/chainguard/linux-vmware-6.12pkg:linux/kernelpkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0
< 6.12.85-r3+ 15 more
- (no CPE)range: < 6.12.85-r3
- (no CPE)range: < 6.12.85-r2
- (no CPE)range: >= 6.6.128, < 6.6.140
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1.160000.2.19
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
Patches
Vulnerability mechanics
References
5- git.kernel.org/stable/c/48caa7542a795c9679ec1bd1bc2592e05a7369a4nvdPatch
- git.kernel.org/stable/c/5000ce7fcb31067566a1a1a2e5b5bbff93625242nvdPatch
- git.kernel.org/stable/c/9e249c48412828e807afddc21527eb734dc9bd3dnvdPatch
- git.kernel.org/stable/c/d51bf43193b1e95dc4e34e540dc76e19def2ae5anvd
- git.kernel.org/stable/c/fca7aa0264ae99e5ff287d0ced5af0b82b121c4fnvd
News mentions
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