osquery up to 5.23.0 Process Command-Line/Current Directory Parser out-of-bounds write

Summaryinfo

A vulnerability was found in osquery up to 5.23.0. It has been rated as very critical. This affects an unknown function of the component Process Command-Line/Current Directory Parser. Performing a manipulation results in out-of-bounds write. This vulnerability is reported as CVE-2026-54000. The attack requires a local approach. No exploit exists.

Detailsinfo

A vulnerability, which was classified as very critical, was found in osquery up to 5.23.0. This affects an unknown function of the component Process Command-Line/Current Directory Parser. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

osquery is a SQL powered operating system instrumentation, monitoring, and analytics framework. Prior to 5.23.1, on Windows, a local unprivileged attacker can cause a heap buffer out-of-bounds write if there is a query of the processes table targeting a maliciously crafted process, due to unchecked PEB string lengths in process command-line and current-directory reads. If exploited successfully, this could allow a potential local privilege escalation from standard user to SYSTEM. This issue is fixed in version 5.23.1.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-54000 since 06/11/2026. The exploitability is told to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/10/2026).

Upgrading to version 5.23.1 eliminates this vulnerability.

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Productinfo

Type

• Survey Software

Name

• osquery

Version

• 5.0
• 5.1
• 5.2
• 5.3
• 5.4
• 5.5
• 5.6
• 5.7
• 5.8
• 5.9
• 5.10
• 5.11
• 5.12
• 5.13
• 5.14
• 5.15
• 5.16
• 5.17
• 5.18
• 5.19
• 5.20
• 5.21
• 5.22
• 5.23.0

Website

• Product: https://github.com/osquery/osquery/

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