CVE-2023-39929

Local privilege escalation via untrusted driver path

Published May 16, 2024 · Updated Sep 6, 2024

Uncontrolled search path in Intel libva before 2.20.0 allows local users to escalate privileges through a user-controlled driver path. Affected builds let va_openDriver derive a shared-object filename from LIBVA_DRIVERS_PATH and load it with dlopen without excluding the environment value during privileged execution. Exploitation requires low-privileged local access, user interaction, and a libva-using process that executes with elevated privileges.

CVSS severity6.7
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled search path in Intel libva before 2.20.0 allows local users to escalate privileges through a user-controlled driver path. Affected builds let va_openDriver derive a shared-object filename from LIBVA_DRIVERS_PATH and load it with dlopen without excluding the environment value during privileged execution. Exploitation requires low-privileged local access, user interaction, and a libva-using process that executes with elevated privileges.

The record

CVE
CVE-2023-39929
Published
May 16, 2024
Updated
Sep 6, 2024
Vendor
Topcon Positioning Systems, Inc.
Product
libva
Classifications
CWE-427, T1574.006
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 6, 2024Record 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=0 <2.20.0
  2. Affected versionversion=before version 2.20.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Topcon Positioning Systems, Inc. · libvaversion=0 <2.20.0; version=before version 2.20.0

Published CVSS scores

6.7Intel CorporationCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

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

CWE-427Uncontrolled Search Path Element
T1574.006Dynamic Linker Hijacking

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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