Is CVE-2026-120454 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-120454?

CVE-2026-120454 has a CVSS v3 severity of MEDIUM (5.5).

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CVE-2026-120454

Description

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.