Description
It was discovered that dpkg-deb does not properly sanitize directory permissions when extracting a control member into a temporary directory, which is
documented as being a safe operation even on untrusted data. This may result in leaving temporary files behind on cleanup. Given automated and repeated execution of dpkg-deb commands on
adversarial .deb packages or with well compressible files, placed
inside a directory with permissions not allowing removal by a non-root
user, this can end up in a DoS scenario due to causing disk quota
exhaustion or disk full conditions.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Debian | dpkg | < ed6bbd445dd8800308c67236ba35d08004c98e82 | ed6bbd445dd8800308c67236ba35d08004c98e82 |
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 | dpkg | 1.22.21 | — |
| Debian 13 | dpkg | 1.22.21 | — |
| Debian 12 | dpkg | 1.21.23 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | dpkg | 1.22.21ubuntu1 | — |
| Ubuntu 24.04 LTS | dpkg | 1.22.6ubuntu6.5 | USN-7768-1 |
| Ubuntu 22.04 LTS | dpkg | 1.21.1ubuntu2.6 | USN-7768-1 |
| Ubuntu 20.04 LTS | dpkg | No fix yet | — |
| Ubuntu 18.04 LTS | dpkg | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | dpkg | No fix yet | — |
| Ubuntu Pro 14.04 LTS | dpkg | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | dpkg +1 | 1.19.0.4-150000.4.7.1 | SUSE-SU-2025:02734-1 |
| SLES 15 SP6 | dpkg +1 | 1.19.0.4-150000.4.7.1 | SUSE-SU-2025:02734-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 6.1 | update-alternatives | 1.22.0-slfo.1.1_2.1 | SUSE-SU-2025:20670-1 |
| SLE Micro 6.0 | update-alternatives | 1.22.0-2.1 | SUSE-SU-2025:20562-1 |
| SLE Micro 5.5 | update-alternatives | 1.19.0.4-150000.4.7.1 | SUSE-SU-2025:02734-1 |
| SLE Micro 5.4 | update-alternatives | 1.19.0.4-150000.4.7.1 | SUSE-SU-2025:02734-1 |
| SLE Micro 5.3 | update-alternatives | 1.19.0.4-150000.4.7.1 | SUSE-SU-2025:02734-1 |
| SLE Micro 5.2 | update-alternatives | 1.19.0.4-150000.4.7.1 | SUSE-SU-2025:02734-1 |
| SLE Micro 5.1 | update-alternatives | 1.19.0.4-150000.4.7.1 | SUSE-SU-2025:02734-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | dpkg | 1.22.21-1.1 | openSUSE-SU-2025:15314-1 |
| openSUSE Leap 15.6 | dpkg +1 | 1.19.0.4-150000.4.7.1 | SUSE-SU-2025:02734-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | dpkg | No fix yet | — |
Advisories 6
- WID-SEC-2025-1445 dpkg: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Jul 7, 2026
- USN-7768-1 dpkg vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- openSUSE-SU-2025:15314-1 dpkg-1.22.21-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20670-1 Security update for dpkg SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:20562-1 Security update for dpkg SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:02734-1 Security update for dpkg SUSE / openSUSE Security Updates · Feb 4, 2026