Infinite loop in Debian dpkg
Priority LOW 39CWE-835Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-835.
Summary
It was discovered that dpkg-deb (a component of dpkg, the Debian package management system) does not properly validate the end of the data stream when uncompressing a zstd-compressed .deb archive, which may result in denial of service (infinite loop spinning the CPU).
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00465 40th percentileScored 2026-11-07
Fix Fixed dpkg (Debian): 1.23.6
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Debian | dpkg | 1.21.18 to before 1.23.6 | 1.23.6 | Patch available | CNA |
- dpkg VendorDebian Affected 1.21.18 to before 1.23.6 Fixed in 1.23.6 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:debian:dpkg:*:*:*:*:*:*:*:* | 1.21.18 to before 1.21.23; 1.22.0 to before 1.22.22; 1.23.0 to before 1.23.6 | Vulnerable | Debian |
- cpe:2.3:a:debian:dpkg:*:*:*:*:*:*:*:* Versions 1.21.18 to before 1.21.23; 1.22.0 to before 1.22.22; 1.23.0 to before 1.23.6 Vulnerable ·Debian
Remediation
- Fix · CNA dpkg (Debian) Fixed in 1.23.6
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2026-2219
- 2026-10-03 Alias added: GHSA-x8w5-j8fh-hpvp
References
More Debian Dpkg vulnerabilities
- TI-2017-05855 dpkg-source in dpkg 1.3.0 through 1.18.23 is able to use a non-GNU patch program and does… CVSS 3.0CRITICAL 9.8
- TI-2022-01534 directory traversal for in-place extracts with untrusted v2 and v3 source packages with debian.tar CVSS 3.1CRITICAL 9.8
- TI-2025-05698 dpkg-deb: Fix cleanup for control member with restricted directories CVSS 3.1HIGH 8.2
- TI-2015-00801 Off-by-one error in the extracthalf function in dpkg-deb/extract.c in the dpkg-deb… CVSS 2.0HIGH 7.5
- TI-2014-07084 Multiple format string vulnerabilities in the parse_error_msg function in parsehelp.c in… CVSS 2.0MEDIUM 6.8
- TI-2010-01621 Directory traversal vulnerability in dpkg-source in dpkg before 1.14.31 and 1.15.x allows… CVSS 2.0MEDIUM 6.8
Sources
- CVE-2026-2219 · CVE Program
- CVE-2026-2219 · NVD
- FIRST EPSS
- GHSA-x8w5-j8fh-hpvp · GitHub Advisory Database · CC BY 4.0
- CVE-2026-2219 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences