The xz_decomp function in xzlib.c in libxml2 2.9.1 does not properly detect compression…
Priority LOW 19CWE-399Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- High
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- Partial Red Hat: 11 fixed, 1 without a fix
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-399 and the CVSS impact.
Summary
The xz_decomp function in xzlib.c in libxml2 2.9.1 does not properly detect compression errors, which allows context-dependent attackers to cause a denial of service (process hang) via crafted XML data.
Why it matters now
EPSS 0.03261 88th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 2 advisoriesRed Hat: 11 fixed, 1 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
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
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
| cpe:2.3:a:xmlsoft:libxml2:2.9.1:*:*:*:*:*:*:* | 2.9.1 | Vulnerable | xmlsoft |
| cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* | up to 9.2.1 | Vulnerable | Apple |
| cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* | up to 10.11.3 | Vulnerable | Apple |
| cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* | up to 9.1 | Vulnerable | Apple |
| cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* | up to 2.1 | Vulnerable | Apple |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* | 14.04 | Vulnerable | Canonical |
- cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
- cpe:2.3:a:xmlsoft:libxml2:2.9.1:*:*:*:*:*:*:* Versions 2.9.1 Vulnerable ·xmlsoft
- cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions up to 9.2.1 Vulnerable ·Apple
- cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* Versions up to 10.11.3 Vulnerable ·Apple
- cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions up to 9.1 Vulnerable ·Apple
- cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions up to 2.1 Vulnerable ·Apple
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
Remediation
Red Hat 2 advisories
- RHSA-2020:1190 Released 2020-03-31 · Red Hat rating Moderatelibxml2 security update
- Red Hat Enterprise Linux Client (v. 7) libxml2-2.9.1-6.el7.4, libxml2-python-2.9.1-6.el7.4
- Red Hat Enterprise Linux Client Optional (v. 7) libxml2-devel-2.9.1-6.el7.4, libxml2-static-2.9.1-6.el7.4
- Red Hat Enterprise Linux ComputeNode (v. 7) libxml2-2.9.1-6.el7.4, libxml2-python-2.9.1-6.el7.4
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) libxml2-devel-2.9.1-6.el7.4, libxml2-static-2.9.1-6.el7.4
- Red Hat Enterprise Linux Server (v. 7) libxml2-2.9.1-6.el7.4, libxml2-2.9.1-6.el7.4.ppc, libxml2-devel-2.9.1-6.el7.4 +2
- Red Hat Enterprise Linux Server Optional (v. 7) libxml2-static-2.9.1-6.el7.4, libxml2-static-2.9.1-6.el7.4.ppc
- Red Hat Enterprise Linux Workstation (v. 7) libxml2-2.9.1-6.el7.4, libxml2-devel-2.9.1-6.el7.4, libxml2-python-2.9.1-6.el7.4
- Red Hat Enterprise Linux Workstation Optional (v. 7) libxml2-static-2.9.1-6.el7.4
- RHSA-2016:1089 Released 2016-05-17 · Red Hat rating ModerateRed Hat JBoss Web Server 3.0.3 security update
- Red Hat JBoss Web Server 3.0
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat JBoss Enterprise Web Server 2 | Affected | No fix planned: Will not fix |
| Red Hat Ansible Tower 3.5 for RHEL 7 Server | Fixed | — |
| Red Hat Ansible Tower 3.6 for RHEL 7 | Fixed | — |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2020:1190 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2020:1190 |
| Red Hat Enterprise Linux ComputeNode (v. 7) | Fixed | RHSA-2020:1190 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2020:1190 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2020:1190 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2020:1190 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2020:1190 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2020:1190 |
| Red Hat JBoss Web Server 3.0 | Fixed | RHSA-2016:1089 |
Not affected: 2 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2015-8035
- 2026-10-03 Alias added: GHSA-cprg-r8c2-9m62
References
Advisory 13
Other 9
- https://support.apple.com/HT206167
- https://support.apple.com/HT206168
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05111017
- [oss-security] 20151102 CVE request: DoS in libxml2 if xz is enabled
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05158380
- [oss-security] 20151102 Re: CVE request: DoS in libxml2 if xz is enabled
- [oss-security] 20151103 Re: CVE request: DoS in libxml2 if xz is enabled
- https://support.apple.com/HT206169
- https://support.apple.com/HT206166
Sources
- CVE-2015-8035 · CVE Program
- CVE-2015-8035 · NVD
- FIRST EPSS
- GHSA-cprg-r8c2-9m62 · GitHub Advisory Database · CC BY 4.0
- CVE-2015-8035 · Red Hat security data · CC BY 4.0
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