NULL pointer dereference in The Sleuth Kit
CVE-2026-120454
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/sleuthkit/sleuthkit/issues/3583 (issue-tracking)
- github.com/sleuthkit/sleuthkit/blob/sleuthkit-4.15.0/tsk/fs/decmpfs.c (technical-description)
- github.com/sleuthkit/sleuthkit/releases/tag/sleuthkit-4.15.0 (release-notes)
- hackmd.io/@haindpwn/sleuthkit-hfs-decmpfs-attr-oob-read (technical-description)
- www.vulncheck.com/advisories/the-sleuth-kit-through-4.15.0-null-pointer-derefer… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-120454?
- CVE-2026-120454 is a medium-severity vulnerability in The Sleuth Kit, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2026-11-02.
- How severe is CVE-2026-120454?
- Medium severity. CVSS v3 base score is 5.5 out of 10.