CVE-2026-120454

The Sleuth Kit through 4.15.0 NULL Pointer Dereference via decmpfs LZVN Decompression

CVSS score

6.8

EPSS probability

—

Risk score

0.7

Published

3 h ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

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Vulnerability description

DayBreach AI Explanation

Verified against sources

CVE-2026-120454: The Sleuth Kit NULL Pointer Dereference Vulnerability

Sources read

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

The Sleuth Kit through 4.15.0 contains a NULL pointer dereference vulnerability in decmpfs_decompress_lzvn_attr() [S0, S1].

Why does it matter?

Supplying a crafted HFS+ image causes the tool to crash, resulting in a denial of service condition [S0, S1].

What should be done?

Follow vendor advisories as patch status is unknown [S0].
Check official project resources for updates [S1].

Chain of evidence and sources2 verified claims

The Sleuth Kit 4.15.0 ve önceki sürümler, decmpfs LZVN açma işleminde NULL pointer dereference zafiyeti barındırmaktadır [S0, S1].

S0 · daybreach-canonical S1 · cvelist

Zafiyet, hazırlanmış bir HFS+ görüntüsü ile aracın çökmesine ve hizmet dışı kalmasına neden olabilir [S0, S1].

S0 · daybreach-canonical S1 · cvelist

Show the technical text from the sources

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.

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

CWE: CWE-476

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-120454 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	The Sleuth Kit	The Sleuth Kit	View

Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
6.8	CVSS V40	MEDIUM	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X	NVD
6.8	CVSS V4_0	MEDIUM	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	CVE CNA
5.5	CVSS V31	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H	NVD
5.5	CVSS V3_1	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H	CVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-120454 is associated with the following CWEs:

CWE-476: NULL Pointer Dereference

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-120454 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureYerel erişim

PermissionsGerekmiyor

User—

Official Sources and Advisories

https://github.com/sleuthkit/sleuthkit/issues/3583vendor-advisory https://github.com/sleuthkit/sleuthkit/blob/sleuthkit-4.15.0/tsk/fs/decmpfs.c#L1154-L1169vendor-advisory The Sleuth Kit sleuthkit-4.15.0 Release Notesvendor-advisory https://hackmd.io/@haindpwn/sleuthkit-hfs-decmpfs-attr-oob-readvendor-advisory VulnCheck Advisory: The Sleuth Kit through 4.15.0 NULL Pointer Dereference via decmpfs LZVN Decompressionvendor-advisory

CVSS Vector Radar Chart

6.8 / 10

Vulnerability Scoring Details

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

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone required

User InteractionP

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)P

Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

The Sleuth Kit

Weakness Type (CWE & CAPEC)

CWE-476

Similar Vulnerabilities

4.8

CVE-2026-120453The Sleuth Kit through 4.15.0 Heap Out-of-Bounds Read via HFS+ decmpfs Header

VendorThe Sleuth Kit ProductThe Sleuth Kit

Patch status unknown3 h ago

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