CVE-2023-54137

Stack-data disclosure via uninitialized VFIO padding

Published Dec 24, 2025 · Updated Dec 24, 2025

Information disclosure in affected Linux kernel 5.8 through 6.5 releases allows local users to read stack bytes through a VFIO ioctl. vfio_iommu_migration_build_caps leaves a four-byte padding hole in vfio_iommu_type1_info_cap_migration uninitialized, and vfio_info_add_capability copies the whole structure for VFIO_IOMMU_GET_INFO. Access to a configured VFIO type1 container is required, and each request exposes only the padding contents rather than an attacker-selected memory range.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in affected Linux kernel 5.8 through 6.5 releases allows local users to read stack bytes through a VFIO ioctl. vfio_iommu_migration_build_caps leaves a four-byte padding hole in vfio_iommu_type1_info_cap_migration uninitialized, and vfio_info_add_capability copies the whole structure for VFIO_IOMMU_GET_INFO. Access to a configured VFIO type1 container is required, and each request exposes only the padding contents rather than an attacker-selected memory range.

The record

CVE
CVE-2023-54137
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.8
  2. Affected versionversion=ad721705d09c62f0d108a6b4f59867ebfd592c90 <13fd667db999bffb557c5de7adb3c14f1713dd51
  3. Affected versionversion=ad721705d09c62f0d108a6b4f59867ebfd592c90 <1b5feb8497cdb5b9962db2700814bffbc030fb4a
  4. Affected versionversion=ad721705d09c62f0d108a6b4f59867ebfd592c90 <ad83d83dd891244de0d07678b257dc976db7c132
  5. Affected versionversion=ad721705d09c62f0d108a6b4f59867ebfd592c90 <cbac29a1caa49a34e131394e1f4d924a76d8b0c9
  6. Affected versionversion=ad721705d09c62f0d108a6b4f59867ebfd592c90 <cd24e2a60af633f157d7e59c0a6dba64f131c0b1
  7. Affected versionversion=ad721705d09c62f0d108a6b4f59867ebfd592c90 <f6f300ecc196d243c02adeb9ee0c62c677c24bfb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.8; version=ad721705d09c62f0d108a6b4f59867ebfd592c90 <13fd667db999bffb557c5de7adb3c14f1713dd51; version=ad721705d09c62f0d108a6b4f59867ebfd592c90 <1b5feb8497cdb5b9962db2700814bffbc030fb4a; version=ad721705d09c62f0d108a6b4f59867ebfd592c90 <ad83d83dd891244de0d07678b257dc976db7c132; version=ad721705d09c62f0d108a6b4f59867ebfd592c90 <cbac29a1caa49a34e131394e1f4d924a76d8b0c9; version=ad721705d09c62f0d108a6b4f59867ebfd592c90 <cd24e2a60af633f157d7e59c0a6dba64f131c0b1; version=ad721705d09c62f0d108a6b4f59867ebfd592c90 <f6f300ecc196d243c02adeb9ee0c62c677c24bfb

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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