---
id: CVE-2026-120454
title: >-
  The Sleuth Kit through 4.15.0 NULL Pointer Dereference via decmpfs LZVN
  Decompression
summary: >-
  The Sleuth Kit through 4.15.0 contains a NULL pointer dereference
  vulnerability in decmpfs_decompress_lzvn_attr() that allows attackers to crash
  the tool by supplying a crafted HFS+ image. Attackers can set a huge
  uncompressed_size in an…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-476
vendor: The Sleuth Kit
product: The Sleuth Kit
affected:
  - the_sleuth_kit <= 4.15.0
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T21:44:10.659258Z'
exploitAvailable: true
published: '2026-11-02'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T21:44:51.763Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-120454'
references:
  - url: 'https://github.com/sleuthkit/sleuthkit/issues/3583'
  - url: >-
      https://github.com/sleuthkit/sleuthkit/blob/sleuthkit-4.15.0/tsk/fs/decmpfs.c#L1154-L1169
  - url: 'https://github.com/sleuthkit/sleuthkit/releases/tag/sleuthkit-4.15.0'
    label: The Sleuth Kit sleuthkit-4.15.0 Release Notes
  - url: 'https://hackmd.io/@haindpwn/sleuthkit-hfs-decmpfs-attr-oob-read'
  - url: >-
      https://www.vulncheck.com/advisories/the-sleuth-kit-through-4.15.0-null-pointer-dereference-via-decmpfs-lzvn-decompression
    label: >-
      VulnCheck Advisory: The Sleuth Kit through 4.15.0 NULL Pointer Dereference
      via decmpfs LZVN Decompression
tags:
  - cve.org
  - exploit-available
epss: 0.00121
epssPercentile: 0.0194
ingestedAt: '2026-11-05T19:30:42.660Z'
---

## Overview

The Sleuth Kit through 4.15.0 contains a NULL pointer dereference vulnerability in decmpfs_decompress_lzvn_attr() that allows attackers to crash the tool by supplying a crafted HFS+ image. Attackers can set a huge uncompressed_size in an LZVN inline com.apple.decmpfs attribute so allocation fails and the decoder writes through NULL, causing denial of service.

## Affected

- `the_sleuth_kit <= 4.15.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.