CVE-2026-24857 MEDIUM

CVE-2026-24857: bulk_extractor has Heap-based Buffer Overflow vulnerability

Vendor Simsong
Product bulk_extractor
Weakness CWE-122
Published January 28, 2026
Last update January 29, 2026

CVSS base score

5.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

`bulk_extractor` is a digital forensics exploitation tool. Starting in version 1.4, `bulk_extractor`’s embedded unrar code has a heap‑buffer‑overflow in the RAR PPM LZ decoding path. A crafted RAR inside a disk image causes an out‑of‑bounds write in `Unpack::CopyString`, leading to a crash under ASAN (and likely a crash or memory corruption in production builds). There's potential for using this for RCE. As of time of publication, no known patches are available.

Key dates

02Disclosure timeline

January 28, 2026 CVE published
January 29, 2026 Record updated