Description
(1) unsquash-1.c, (2) unsquash-2.c, (3) unsquash-3.c, and (4) unsquash-4.c in Squashfs and sasquatch allow remote attackers to cause a denial of service (application crash) via a crafted input.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | squashfs-tools | 1:4.3-2 | — |
| Debian 13 | squashfs-tools | 1:4.3-2 | — |
| Debian 12 | squashfs-tools | 1:4.3-2 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | squashfs | 4.6.1-150300.3.3.1 | SUSE-SU-2023:4591-1 |
| SLES 15 SP4 | squashfs | 4.6.1-150300.3.3.1 | SUSE-SU-2023:4591-1 |
| SLES 15 SP3 | squashfs | 4.6.1-150300.3.3.1 | SUSE-SU-2023:4591-1 |
| SLES 12 SP5 | squashfs | 4.6.1-8.3.2 | SUSE-SU-2023:4424-1 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP3 | squashfs | 4.6.1-150300.3.3.1 | SUSE-SU-2023:4591-1 |
| SLES for SAP 12 SP5 | squashfs | 4.6.1-8.3.2 | SUSE-SU-2023:4424-1 |
| SLE Micro 5.5 | squashfs | 4.6.1-150300.3.3.1 | SUSE-SU-2024:2463-1, SUSE-SU-2023:4591-1 |
| SLE Micro 5.4 | squashfs | 4.6.1-150300.3.3.1 | SUSE-SU-2023:4591-1 |
| SLE Micro 5.3 | squashfs | 4.6.1-150300.3.3.1 | SUSE-SU-2023:4591-1 |
| SLE Micro 5.2 | squashfs | 4.6.1-150300.3.3.1 | SUSE-SU-2023:4591-1 |
| SLE Micro 5.1 | squashfs | 4.6.1-150300.3.3.1 | SUSE-SU-2023:4591-1 |
| SLE HPC 15 SP3 | squashfs | 4.6.1-150300.3.3.1 | SUSE-SU-2023:4591-1 |
| SUSE Manager Server 4.2 | squashfs | 4.6.1-150300.3.3.1 | SUSE-SU-2023:4591-1 |
| SUSE Manager Proxy 4.2 | squashfs | 4.6.1-150300.3.3.1 | SUSE-SU-2023:4591-1 |
| SUSE Enterprise Storage 7.1 | squashfs | 4.6.1-150300.3.3.1 | SUSE-SU-2023:4591-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.5 | squashfs | 4.6.1-150300.3.3.1 | SUSE-SU-2023:4591-1 |
| openSUSE Leap 15.4 | squashfs | 4.6.1-150300.3.3.1 | SUSE-SU-2023:4591-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.4 | squashfs | 4.6.1-150300.3.3.1 | SUSE-SU-2023:4591-1 |
| openSUSE Leap Micro 5.3 | squashfs | 4.6.1-150300.3.3.1 | SUSE-SU-2023:4591-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | squashfs-tools | 4.3-0.21.gitaae0aff4.amzn2.0.2 | ALAS2-2023-2152 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | squashfs-tools | 4.5-1 | — |
Advisories 4
- SUSE-SU-2023:4591-1 Security update for squashfs SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4424-1 Security update for squashfs SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2463-1 Security update for squashfs SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2-2023-2152 Moderate: squashfs-tools security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jul 19, 2023