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CVE-2026-120454

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

6.8 Medium

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.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
Passive

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.12%Unchanged since Nov 3, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.8

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

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.

Record
CVE-2026-120454
CVSS 4.0
6.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-05
EUVDEUVD-2026-115214 6.8

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.

Record
EUVD-2026-115214
CVSS 4.0
6.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-05
GitHub AdvisoriesGHSA-gr3p-v4fr-f93c 6.8

The Sleuth Kit through 4.15.0 contains a NULL pointer dereference vulnerability in...

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.

Record
GHSA-gr3p-v4fr-f93c
CVSS 4.0
6.8 MediumCVSS: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
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-06
NVD 6.8

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.

Record
CVE-2026-120454
CVSS 4.0
6.8 MediumCVSS: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
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-05
OSV 6.8

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

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.

Record
CVE-2026-120454
CVSS 4.0
6.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-476
Updated
2026-11-07
OSVDEBIAN-CVE-2026-120454 6.8

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.

Record
DEBIAN-CVE-2026-120454
CVSS 4.0
6.8 MediumCVSS: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
Updated
2026-11-07
OSVUBUNTU-CVE-2026-120454 6.8

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.

Record
UBUNTU-CVE-2026-120454
CVSS 4.0
6.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-05
OSVAZL-112817 No score

CVE-2026-120454 affecting package sleuthkit 4.12.1-2

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.

Record
AZL-112817
Updated
2026-11-07

Affected products

Affected packages

Affected packages
PackageAffectedFixed
sleuthkit
Azure Linux:3
 through 4.12.1-2 None known
sleuthkit
Debian:12
 All versions, plus listed versions
4.11.1+dfsg-14.12.0+dfsg-14.12.1+dfsg-14.12.1+dfsg-1.14.12.1+dfsg-1.1~exp1
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4.12.1+dfsg-24.12.1+dfsg-34.14.0+dfsg-14.15.0+dfsg-1
 None known
sleuthkit
Debian:13
 All versions, plus listed versions
4.12.1+dfsg-34.14.0+dfsg-14.15.0+dfsg-1
 None known
sleuthkit
Debian:14
 All versions, plus listed versions
4.12.1+dfsg-34.14.0+dfsg-14.15.0+dfsg-1
 None known
sleuthkit
Ubuntu:Pro:14.04:LTS
 All versions, plus listed versions
3.2.3-2ubuntu13.2.3-2ubuntu23.2.3-2.13.2.3-2.23.2.3-2.2ubuntu0.1~esm1
 None known
sleuthkit
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
4.1.3-11ubuntu24.1.3-12ubuntu14.2.0-34.2.0-3ubuntu0.1~esm1
 None known
sleuthkit
Ubuntu:18.04:LTS
 All versions, plus listed versions
4.4.2-14.4.2-3
 None known
sleuthkit
Ubuntu:20.04:LTS
 All versions, plus listed versions
4.6.5-14.6.7-14.6.7-1build1
 None known
sleuthkit
Ubuntu:22.04:LTS
 All versions, plus listed versions
4.10.1+dfsg-14.11.0+dfsg-14.11.1+dfsg-1
 None known
sleuthkit
Ubuntu:24.04:LTS
 All versions, plus listed versions
4.12.0+dfsg-14.12.1+dfsg-14.12.1+dfsg-1.1ubuntu14.12.1+dfsg-1.1ubuntu2
 None known
sleuthkit
Ubuntu:26.10
 All versions, plus listed versions
4.12.1+dfsg-3build14.14.0+dfsg-1
 None known
sleuthkit
Ubuntu:26.04:LTS
 All versions, plus listed versions
4.12.1+dfsg-34.12.1+dfsg-3build1
 None known

History

History
RecordedChangedSources
affected, aliases, referencesOSV
affected, aliases, referencesOSV
referencesEUVD, GitHub Advisories, NVD, OSV
referencesCVE List, OSV
affected, aliases, referencesOSV
factsEUVD, OSV
referencesNVD, OSV
first indexedCVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-120454 is a medium vulnerability (CVSS 6.8) in The Sleuth Kit Sleuth Kit, published November 2, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.12%, the 1st percentile. No source names a fixed version.

References

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