[UPDATE] [medium] X.Org X11 (libXfont2): Multiple vulnerabilities enable privilege escalation and denial of service
A remote, anonymous attacker can exploit multiple vulnerabilities in X.Org X11 to escalate privileges and to perform a denial of service attack.
CSIRTS triage
- What
- Multiple vulnerabilities in libXfont2 enable privilege escalation and denial of service attacks.
- Who is affected
- Systems running X.Org X11 with libXfont2 library are affected by remote attacks.
- Urgency
- Medium severity with remote unauthenticated attack vectors affecting system stability and privilege boundaries.
- Action
- Update libXfont2 to the latest patched version through your distribution package manager.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2658
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-44950 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-59679 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for X.Org X11 (libXfont2)
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- medium[NEW] [medium] X.Org X11 Server (libXfont2): Multiple vulnerabilities allow execution of arbitrary code with a…cert-bund · 2026-08-06
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