CVE-2024-27934 - CVE House
Back to Database
Status published High CVE-2024-27934

*const c_void / ExternalPointer unsoundness leading to use-after-free

Vulnerability Description

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Starting in version 1.36.2 and prior to version 1.40.3, use of inherently unsafe `*const c_void` and `ExternalPointer` leads to use-after-free access of the underlying structure, resulting in arbitrary code execution. Use of inherently unsafe `*const c_void` and `ExternalPointer` leads to use-after-free access of the underlying structure, which is exploitable by an attacker controlling the code executed inside a Deno runtime to obtain arbitrary code execution on the host machine regardless of permissions. This bug is known to be exploitable for both `*const c_void` and `ExternalPointer` implementations. Version 1.40.3 fixes this issue.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2024-27934

Credits & Attribution

No credits recorded in the NVD database.

References

More from denoland

View All →
CVE-2025-61787
Deno is Vulnerable to Command Injection on Windows During Batch File Execution
High 8.1
CVE-2025-61786
Deno's --deny-read check does not prevent permission bypass
Low 3.3
CVE-2025-61785
Deno's --deny-write check does not prevent permission bypass
Low 3.3
CVE-2025-55195
@std/toml Prototype Pollution in Node.js and Browser
High 7.3
CVE-2025-48935
Deno has --allow-read / --allow-write permission bypass in `node:sqlite`
Medium 5.5

Affected Vendor

Affected Software

deno
Vulnerable Versions:
>= 1.36.2, < 1.40.3

Timeline

Official Publish: March 6th, 2024
Last Modified: August 2nd, 2024
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

CWE-416

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application
Initial Access
T1068 Exploitation for Privilege Escalation
Privilege Escalation
T1055 Process Injection
Defense Evasion
T1105 Ingress Tool Transfer
Command and Control
T1485 Data Destruction
Impact