Buffer overflow in Simsong Bulk Extractor
CVE-2026-24857
`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.
Vulnerability class: Buffer Overflow
EPSS: 0.004 (30.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Simsong Bulk_extractor — versions >= 1.4, <= 2.1.1
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-24857?
- CVE-2026-24857 is a critical-severity vulnerability in Simsong Bulk Extractor, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-01-28.
- How severe is CVE-2026-24857?
- Critical severity. CVSS v3 base score is 9.8 out of 10.