Vulnerability DatabaseCVE-2026-120454
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CVE-2026-120454
Published:November 02, 2026
Updated:November 04, 2026
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.
Related Resources (8)
https://github.com/sleuthkit/sleuthkit/releases/tag/sleuthkit-4.15.0
https://github.com/sleuthkit/sleuthkit/issues/3583
https://github.com/sleuthkit/sleuthkit/blob/sleuthkit-4.15.0/tsk/fs/decmpfs.c#L1154-L1169
https://www.vulncheck.com/advisories/the-sleuth-kit-through-4.15.0-null-pointer-dereference-via-decmpfs-lzvn-decompression
https://nvd.nist.gov/vuln/detail/CVE-2026-120454
https://hackmd.io/@haindpwn/sleuthkit-hfs-decmpfs-attr-oob-read
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/120xxx/CVE-2026-120454.json
https://github.com/sleuthkit/sleuthkit
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CVSS v4
Base Score:
6.8
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.5
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
NULL Pointer Dereference
CWE-476
EPSS
Base Score:
0.12