CVE-2023-54034 | iommufd: Make sure to zero vfio_iommu_type1_info before copying to user

In the Linux kernel, the following vulnerability has been resolved: iommufd: Make sure to zero vfio_iommu_type1_info before copying to user Missed a zero initialization here. Most of the struct is filled with a copy_from_user(), however minsz for that copy is smaller than the actual struct by 8 bytes, thus we don't fill the padding.

Published: 2025-12-24 Last update: 2026-04-15 Assigner: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Conclusion & alert: CVE-2023-54034 is rated Low Risk (4.2/100): low exploitation likelihood (EPSS 0.14%). Mandatory action: Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-54034

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.02% 0.14% +0.13%
2 2025-12-24 0.02%

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-54034

CVSS metrics for this CVE.

No CVSS data in dataset for this CVE.

Weakness enumeration for CVE-2023-54034

OS Trackers for CVE-2023-54034

vendor priority summary link
debian unimportant CVE-2023-54034 unimportant priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2023-54034
redhat medium https://access.redhat.com/security/cve/CVE-2023-54034
suse medium CVE-2023-54034 severity moderate: SUSE including 26 source package names (cluster-md-kmp-default, dlm-kmp-default, …), 315 product×package rows across 61 product lines (SLES-LTSS-TERADATA 15 SP2, SUSE Linux Enterprise High Availability Extension 15 SP3, … (61 product lines)): Known Not Affected 315. https://www.suse.com/security/cve/CVE-2023-54034/
ubuntu medium CVE-2023-54034 medium priority: Ubuntu including 157 source packages (linux, linux-allwinner-5.19, …), 1405 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): DNE 1010, ignored 173, not-affected 139, released 83. https://ubuntu.com/security/CVE-2023-54034

Affected software / configurations for CVE-2023-54034

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2023-54034

cvelogic Threat Intelligence