Format string vulnerability in libxml2 before 2.9.4 allows attackers to have unspecified…
Priority MEDIUM 52CWE-134Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 17 fixed, 2 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-134 and the CVSS impact.
Summary
Format string vulnerability in libxml2 before 2.9.4 allows attackers to have unspecified impact via format string specifiers in unknown vectors.
Why it matters now
EPSS 0.07039 94th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 17 fixed, 2 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 · 41
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:hp:icewall_federation_agent:3.0:*:*:*:*:*:*:* | 3.0 | Vulnerable | Hewlett Packard Enterprise |
| cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* | 6.0 | Running on | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | 7.0 | Running on | Red Hat |
| cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* | up to 2.2.1 | Vulnerable | Apple |
| cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* | before 10.11.6 | Vulnerable | Apple |
| cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:* | up to 2.9.3 | Vulnerable | xmlsoft |
| cpe:2.3:a:apple:icloud:*:*:*:*:*:*:*:* | before 5.2.1 | Vulnerable | Apple |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
| cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* | up to 9.3.2 | Vulnerable | Apple |
| cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
- cpe:2.3:a:hp:icewall_federation_agent:3.0:*:*:*:*:*:*:* Versions 3.0 Vulnerable ·Hewlett Packard Enterprise
- cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Running on ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Running on ·Red Hat
- cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions up to 2.2.1 Vulnerable ·Apple
- cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* Versions before 10.11.6 Vulnerable ·Apple
- cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:* Versions up to 2.9.3 Vulnerable ·xmlsoft
- cpe:2.3:a:apple:icloud:*:*:*:*:*:*:*:* Versions before 5.2.1 Vulnerable ·Apple
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
- cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions up to 9.3.2 Vulnerable ·Apple
- cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
Show 31 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_aus:7.2:*:*:*:*:*:*:* | 7.2 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:* | 7.3 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:* | 7.4 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* | 7.6 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*:* | 7.7 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_eus:7.2:*:*:*:*:*:*:* | 7.2 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:* | 7.3 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:* | 7.4 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* | 7.5 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:* | 7.6 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_eus:7.7:*:*:*:*:*:*:* | 7.7 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_tus:7.2:*:*:*:*:*:*:* | 7.2 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_tus:7.3:*:*:*:*:*:*:* | 7.3 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* | 7.6 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_server_tus:7.7:*:*:*:*:*:*:* | 7.7 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* | 6.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:a:apple:itunes:*:*:*:*:*:*:*:* | up to 12.4.1 | Vulnerable | Apple |
| cpe:2.3:o:microsoft:windows:*:*:*:*:*:*:*:* | all versions | Running on | Microsoft |
| cpe:2.3:o:slackware:slackware_linux:14.0:*:*:*:*:*:*:* | 14.0 | Vulnerable | Slackware |
| cpe:2.3:o:slackware:slackware_linux:14.1:*:*:*:*:*:*:* | 14.1 | Vulnerable | Slackware |
| cpe:2.3:o:oracle:vm_server:3.3:*:*:*:*:*:*:* | 3.3 | Vulnerable | Oracle |
| cpe:2.3:o:oracle:vm_server:3.4:*:*:*:*:*:*:* | 3.4 | Vulnerable | Oracle |
| cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* | up to 9.2.1 | Vulnerable | Apple |
| cpe:2.3:a:tenable:log_correlation_engine:4.8.0:*:*:*:*:*:*:* | 4.8.0 | Vulnerable | Tenable |
| cpe:2.3:a:mcafee:web_gateway:*:*:*:*:*:*:*:* | up to 7.5.2.10; 7.6.0.0 – 7.6.2.3 | Vulnerable | McAfee |
| cpe:2.3:o:oracle:linux:6:*:*:*:*:*:*:* | 6 | Vulnerable | Oracle |
| cpe:2.3:o:oracle:linux:7:0:*:*:*:*:*:* | 7 0 | Vulnerable | Oracle |
- cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.2:*:*:*:*:*:*:* Versions 7.2 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:* Versions 7.3 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*:* Versions 7.7 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.2:*:*:*:*:*:*:* Versions 7.2 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:* Versions 7.3 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* Versions 7.5 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_eus:7.7:*:*:*:*:*:*:* Versions 7.7 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_tus:7.2:*:*:*:*:*:*:* Versions 7.2 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_tus:7.3:*:*:*:*:*:*:* Versions 7.3 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_server_tus:7.7:*:*:*:*:*:*:* Versions 7.7 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:a:apple:itunes:*:*:*:*:*:*:*:* Versions up to 12.4.1 Vulnerable ·Apple
- cpe:2.3:o:microsoft:windows:*:*:*:*:*:*:*:* Versions all versions Running on ·Microsoft
- cpe:2.3:o:slackware:slackware_linux:14.0:*:*:*:*:*:*:* Versions 14.0 Vulnerable ·Slackware
- cpe:2.3:o:slackware:slackware_linux:14.1:*:*:*:*:*:*:* Versions 14.1 Vulnerable ·Slackware
- cpe:2.3:o:oracle:vm_server:3.3:*:*:*:*:*:*:* Versions 3.3 Vulnerable ·Oracle
- cpe:2.3:o:oracle:vm_server:3.4:*:*:*:*:*:*:* Versions 3.4 Vulnerable ·Oracle
- cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions up to 9.2.1 Vulnerable ·Apple
- cpe:2.3:a:tenable:log_correlation_engine:4.8.0:*:*:*:*:*:*:* Versions 4.8.0 Vulnerable ·Tenable
- cpe:2.3:a:mcafee:web_gateway:*:*:*:*:*:*:*:* Versions up to 7.5.2.10; 7.6.0.0 – 7.6.2.3 Vulnerable ·McAfee
- cpe:2.3:o:oracle:linux:6:*:*:*:*:*:*:* Versions 6 Vulnerable ·Oracle
- cpe:2.3:o:oracle:linux:7:0:*:*:*:*:*:* Versions 7 0 Vulnerable ·Oracle
Remediation
Red Hat 2 advisories
- RHSA-2016:2957 Released 2016-12-15 · Red Hat rating ImportantRed Hat JBoss Core Services Apache HTTP 2.4.23 Release
- Red Hat JBoss Core Services
- RHSA-2016:1292 Released 2016-06-23 · Red Hat rating Importantlibxml2 security update
- Red Hat Enterprise Linux Client (v. 7) libxml2-2.9.1-6.el7_2.3, libxml2-python-2.9.1-6.el7_2.3
- Red Hat Enterprise Linux Client Optional (v. 7) libxml2-devel-2.9.1-6.el7_2.3, libxml2-static-2.9.1-6.el7_2.3
- Red Hat Enterprise Linux ComputeNode (v. 7) libxml2-2.9.1-6.el7_2.3, libxml2-python-2.9.1-6.el7_2.3
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) libxml2-devel-2.9.1-6.el7_2.3, libxml2-static-2.9.1-6.el7_2.3
- Red Hat Enterprise Linux Desktop (v. 6) libxml2-2.7.6-21.el6_8.1, libxml2-python-2.7.6-21.el6_8.1
- Red Hat Enterprise Linux Desktop Optional (v. 6) libxml2-devel-2.7.6-21.el6_8.1, libxml2-static-2.7.6-21.el6_8.1
- Red Hat Enterprise Linux HPC Node (v. 6) libxml2-2.7.6-21.el6_8.1, libxml2-python-2.7.6-21.el6_8.1
- Red Hat Enterprise Linux HPC Node Optional (v. 6) libxml2-devel-2.7.6-21.el6_8.1, libxml2-static-2.7.6-21.el6_8.1
- Red Hat Enterprise Linux Server (v. 6) libxml2-2.7.6-21.el6_8.1, libxml2-2.7.6-21.el6_8.1.ppc, libxml2-devel-2.7.6-21.el6_8.1 +2
- Red Hat Enterprise Linux Server (v. 7) libxml2-2.9.1-6.el7_2.3, libxml2-2.9.1-6.el7_2.3.ppc, libxml2-devel-2.9.1-6.el7_2.3 +2
- Red Hat Enterprise Linux Server Optional (v. 6) libxml2-static-2.7.6-21.el6_8.1
- Red Hat Enterprise Linux Server Optional (v. 7) libxml2-static-2.9.1-6.el7_2.3, libxml2-static-2.9.1-6.el7_2.3.ppc
- Red Hat Enterprise Linux Workstation (v. 6) libxml2-2.7.6-21.el6_8.1, libxml2-devel-2.7.6-21.el6_8.1, libxml2-python-2.7.6-21.el6_8.1
- Red Hat Enterprise Linux Workstation (v. 7) libxml2-2.9.1-6.el7_2.3, libxml2-devel-2.9.1-6.el7_2.3, libxml2-python-2.9.1-6.el7_2.3
- Red Hat Enterprise Linux Workstation Optional (v. 6) libxml2-static-2.7.6-21.el6_8.1
- Red Hat Enterprise Linux Workstation Optional (v. 7) libxml2-static-2.9.1-6.el7_2.3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Will not fix |
| Red Hat JBoss Enterprise Web Server 3 | Affected | No fix yet |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2016:1292 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2016:1292 |
| Red Hat Enterprise Linux ComputeNode (v. 7) | Fixed | RHSA-2016:1292 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2016:1292 |
| Red Hat Enterprise Linux Desktop (v. 6) | Fixed | RHSA-2016:1292 |
| Red Hat Enterprise Linux Desktop Optional (v. 6) | Fixed | RHSA-2016:1292 |
| Red Hat Enterprise Linux HPC Node (v. 6) | Fixed | RHSA-2016:1292 |
| Red Hat Enterprise Linux HPC Node Optional (v. 6) | Fixed | RHSA-2016:1292 |
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2016:1292 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2016:1292 |
| Red Hat Enterprise Linux Server Optional (v. 6) | Fixed | RHSA-2016:1292 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2016:1292 |
| Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2016:1292 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2016:1292 |
| Red Hat Enterprise Linux Workstation Optional (v. 6) | Fixed | RHSA-2016:1292 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2016:1292 |
| Red Hat JBoss Core Services | Fixed | RHSA-2016:2957 |
Timeline
- 2026-10-02 Threatist record created from CVE-2016-4448
- 2026-10-03 Alias added: GHSA-wfj9-g4pj-c38g
References
Advisory 18
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- https://kc.mcafee.com/corporate/index?page=content&id=SB10170
- SSA:2016-148-01
- RHSA-2016:1292
- [oss-security] 20160525 3 libxml2 issues
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
- https://git.gnome.org/browse/libxml2/commit/?id=4472c3a5a5b516aaf59b89be602fbce52756c3e9
- APPLE-SA-2016-07-18-4
- APPLE-SA-2016-07-18-3
- APPLE-SA-2016-07-18-2
- http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
- APPLE-SA-2016-07-18-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1338700
- APPLE-SA-2016-07-18-6
- https://www.tenable.com/security/tns-2016-18
- RHSA-2016:2957
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05194709
- https://git.gnome.org/browse/libxml2/commit/?id=502f6a6d08b08c04b3ddfb1cd21b2f699c1b7f5b
Sources
- CVE-2016-4448 · CVE Program
- CVE-2016-4448 · NVD
- FIRST EPSS
- GHSA-wfj9-g4pj-c38g · GitHub Advisory Database · CC BY 4.0
- CVE-2016-4448 · 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