CVE-2026-54000 Details
Description
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.
A heap buffer overflow vulnerability has been identified in osquery versions prior to 5.23.1 on Windows. This vulnerability allows a local unprivileged attacker to write out of bounds in the heap memory. The issue arises when a query targets a maliciously crafted process in the processes table, exploiting unchecked string lengths from the Process Environment Block (PEB) during command-line and current-directory reads. Successful exploitation could lead to unauthorized privilege escalation from a standard user to the SYSTEM level.
Users can upgrade to osquery version 5.23.1 or later, where this vulnerability has been patched. If an immediate upgrade is not possible, queries to the 'processes' table can be disabled on Windows systems to mitigate the risk.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 10, 2026CISA-ADP
Assessed Jul 13, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/osquery/osquery/commit/3d457c412eb0c986b0c37d8903edae8bc9f9e246 | [email protected] | Source CodeVendor |
| https://github.com/osquery/osquery/pull/8934 | [email protected] | Issue TrackingVendor |
| https://github.com/osquery/osquery/releases/tag/5.23.1 | [email protected] | Release NotesVendor |
| https://github.com/osquery/osquery/security/advisories/GHSA-4r78-6hg6-33gg | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-122 | Heap-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| osquery | <= 5.23.0 (semver) |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 14, 2026 | CVE Modified | CISA-ADP |
| Jul 10, 2026 | CVE Modified | CISA-ADP |
| Jul 10, 2026 | New CVE Received | [email protected] |