Integer overflow in X.org libXfixes before 5.0.3 on 32-bit platforms might allow remote X…
Priority MEDIUM 48CWE-190Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution, Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-190, CWE-264 and the CVSS impact.
Summary
Integer overflow in X.org libXfixes before 5.0.3 on 32-bit platforms might allow remote X servers to gain privileges via a length value of INT_MAX, which triggers the client to stop reading data and get out of sync.
Why it matters now
EPSS 0.03395 88th percentileScored 2026-11-07
Fix Will not fix Red Hat: no fix planned
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 · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:x.org:libxfixes:*:*:*:*:*:*:x86:* | up to 5.0.2 | Vulnerable | x.org |
| cpe:2.3:o:fedoraproject:fedora:24:*:*:*:*:*:*:* | 24 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:25:*:*:*:*:*:*:* | 25 | Vulnerable | Fedoraproject |
- cpe:2.3:a:x.org:libxfixes:*:*:*:*:*:*:x86:* Versions up to 5.0.2 Vulnerable ·x.org
- cpe:2.3:o:fedoraproject:fedora:24:*:*:*:*:*:*:* Versions 24 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:25:*:*:*:*:*:*:* Versions 25 Vulnerable ·Fedoraproject
Remediation
No fixed version listed by the sources yet.
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 Enterprise Linux 6 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Will not fix |
Timeline
- 2026-10-02 Threatist record created from CVE-2016-7944
- 2026-10-03 Alias added: GHSA-j7xf-885g-gx3g
References
Other 4
- [xorg-announce] 20161004 X.Org security advisory: Protocol handling issues in X Window System client libraries
- [oss-security] 20161004 Re: X.Org security advisory: Protocol handling issues in X Window System client libraries
- [oss-security] 20161004 X.Org security advisory: Protocol handling issues in X Window System client libraries
- https://cgit.freedesktop.org/xorg/lib/libXfixes/commit/?id=61c1039ee23a2d1de712843bed3480654d7ef42e
Sources
- CVE-2016-7944 · CVE Program
- CVE-2016-7944 · NVD
- FIRST EPSS
- GHSA-j7xf-885g-gx3g · GitHub Advisory Database · CC BY 4.0
- CVE-2016-7944 · 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