Espruino 2v29 (commit bffc6d0) contains a NULL pointer dereference vulnerability in jslGetRawString() in src/jslex.c. Crafted raw/binary string input can cause the lexer to pass a NULL iterator target to jsvLockAgain(). In RELEASE/NO_ASSERT builds, the missing assertion guard allows a write through the NULL pointer, resulting in memory corruption and application termination or denial of service.
History

Tue, 29 Sep 2026 06:15:00 +0000

Type Values Removed Values Added
Title NULL Pointer Dereference in Espruino Lexer Leading to Memory Corruption

Tue, 29 Sep 2026 04:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.2, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sat, 26 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
First Time appeared Espruino
Espruino espruino
Vendors & Products Espruino
Espruino espruino

Sat, 26 Sep 2026 00:30:00 +0000

Type Values Removed Values Added
Title NULL Pointer Dereference in Espruino Lexer Leading to Memory Corruption
Weaknesses CWE-476

Fri, 25 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Description Espruino 2v29 (commit bffc6d0) contains a NULL pointer dereference vulnerability in jslGetRawString() in src/jslex.c. Crafted raw/binary string input can cause the lexer to pass a NULL iterator target to jsvLockAgain(). In RELEASE/NO_ASSERT builds, the missing assertion guard allows a write through the NULL pointer, resulting in memory corruption and application termination or denial of service.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-09-25T00:00:00.000Z

Updated: 2026-09-29T03:21:20.177Z

Reserved: 2026-09-10T00:00:00.000Z

Link: CVE-2026-88389

cve-icon Vulnrichment

Updated: 2026-09-29T03:20:35.606Z

cve-icon NVD

Status : Deferred

Published: 2026-09-25T15:17:56.687

Modified: 2026-09-30T17:32:07.107

Link: CVE-2026-88389

cve-icon Redhat

No data.