An issue discovered in XZ 5.2.5 allows attackers to cause a denial of service via…
Priority LOW 24Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
An issue discovered in XZ 5.2.5 allows attackers to cause a denial of service via decompression of a crafted file. NOTE: the vendor disputes the claims of "endless output" and "denial of service" because decompression of the 17,486 bytes always results in 114,881,179 bytes, which is often a reasonable size increase.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00249 16th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- 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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-22916
- 2026-10-03 Alias added: GHSA-8rm5-v9qv-hvcc
References
Other 7
- https://tukaani.org/xz/
- https://github.com/snappyJack/CVE-request-XZ-5.2.5-has-denial-of-service-vulnerability
- https://github.com/tukaani-project/xz/issues/61
- https://security-tracker.debian.org/tracker/CVE-2020-22916
- https://bugzilla.redhat.com/show_bug.cgi?id=2234987
- https://bugzilla.suse.com/show_bug.cgi?id=1214590
- http://web.archive.org/web/20230918084612/https://github.com/snappyJack/CVE-request-XZ-5.2.5-has-denial-of-service-vulnerability
More Tukaani Xz vulnerabilities
- TI-2024-02898 Xz: malicious code in distributed source CVSS 3.1CRITICAL 10.0
- TI-2022-01156 Improper input validation in gzip, xz-utils CVSS 3.1HIGH 8.8
- TI-2015-03402 scripts/xzgrep.in in xzgrep 5.2.x before 5.2.0, before 5.0.0 does not properly process… CVSS 3.0HIGH 7.8
- TI-2026-26987 XZ Utils: Buffer overflow in lzma_index_append() CVSS 4.0LOW 1.7
Sources
- CVE-2020-22916 · CVE Program
- CVE-2020-22916 · NVD
- FIRST EPSS
- GHSA-8rm5-v9qv-hvcc · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences