PT-2026-37560 · Linux · Linux Kernel

CVE-2026-43220 · Published 2026-05-06 · Updated 2026-07-24

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An issue exists in the AMD IOMMU driver where concurrent Translation Lookaside Buffer (TLB) invalidations can cause completion waits to time out randomly. This occurs because the cmd sem val variable is incremented outside the IOMMU spinlock, which allows CMD COMPL WAIT commands to be queued out of sequence and violates the ordering assumption in the wait on sem() function.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Related Identifiers

CVE-2026-43220

OESA-2026-2869

OESA-2026-3157

SUSE-SU-2026:3130-1

SUSE-SU-2026:3166-1

Affected Products

Linux Kernel

References · 1169

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43220.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-39932 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43466 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43323 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-46014 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43406 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43350 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-46138 · Security Note
• https://osv.dev/vulnerability/OESA-2026-3157 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2869 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-46093 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-45911 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31440 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31557 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-43156 · Security Note