What’s Vulnerable › Vulnerabilities

CVE-2026-54000: osquery: Heap buffer overflow in `getProcessCurrentDirectory()` via `processes` table (Windows)

• Severity: high (CVSS 7.0 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-10 · updated 2026-07-14
• Weakness: CWE-122

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.

Affected products

• osquery: before 5.23.1

References

• https://github.com/osquery/osquery/commit/3d457c412eb0c986b0c37d8903edae8bc9f9e246
• https://github.com/osquery/osquery/pull/8934
• https://github.com/osquery/osquery/releases/tag/5.23.1
• https://github.com/osquery/osquery/security/advisories/GHSA-4r78-6hg6-33gg

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