Red Hat Security Advisory: libXfont2 security update
Two security vulnerabilities have been identified in the X.Org X11 libXfont2 runtime library affecting Red Hat Enterprise Linux 9 and related variants. These include an out-of-bounds read/write in the Font Server Client encoding (CVE-2026-59679) and a privilege escalation via a heap buffer overflow in the Font Server Client (CVE-2026-44950). Red Hat has released security updates addressing these issues. The vulnerabilities are rated as having an important security impact by Red Hat Product Security.
AI Analysis
Technical Summary
The libXfont2 runtime library used in X.Org X11 contains multiple security flaws. CVE-2026-59679 involves an out-of-bounds read/write in the Font Server Client encoding, while CVE-2026-44950 is a heap buffer overflow that can lead to privilege escalation. These vulnerabilities affect various Red Hat Enterprise Linux 9 versions and related CodeReady Linux Builder and Extended Update Support variants across multiple architectures including x86_64, s390x, ppc64le, and aarch64. Red Hat has issued security advisories and updates to remediate these issues.
Potential Impact
Successful exploitation of these vulnerabilities could allow an attacker to cause out-of-bounds memory access or escalate privileges on affected systems. This could compromise system integrity and security. However, there are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated packages for libXfont2 that address these vulnerabilities. Users should apply the security updates as described in the Red Hat advisory RHSA-2026:55447 and the referenced article https://access.redhat.com/articles/11258 to remediate the issues. No additional mitigation steps are indicated by the vendor.
Red Hat Security Advisory: libXfont2 security update
Description
Two security vulnerabilities have been identified in the X.Org X11 libXfont2 runtime library affecting Red Hat Enterprise Linux 9 and related variants. These include an out-of-bounds read/write in the Font Server Client encoding (CVE-2026-59679) and a privilege escalation via a heap buffer overflow in the Font Server Client (CVE-2026-44950). Red Hat has released security updates addressing these issues. The vulnerabilities are rated as having an important security impact by Red Hat Product Security.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The libXfont2 runtime library used in X.Org X11 contains multiple security flaws. CVE-2026-59679 involves an out-of-bounds read/write in the Font Server Client encoding, while CVE-2026-44950 is a heap buffer overflow that can lead to privilege escalation. These vulnerabilities affect various Red Hat Enterprise Linux 9 versions and related CodeReady Linux Builder and Extended Update Support variants across multiple architectures including x86_64, s390x, ppc64le, and aarch64. Red Hat has issued security advisories and updates to remediate these issues.
Potential Impact
Successful exploitation of these vulnerabilities could allow an attacker to cause out-of-bounds memory access or escalate privileges on affected systems. This could compromise system integrity and security. However, there are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated packages for libXfont2 that address these vulnerabilities. Users should apply the security updates as described in the Red Hat advisory RHSA-2026:55447 and the referenced article https://access.redhat.com/articles/11258 to remediate the issues. No additional mitigation steps are indicated by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:55447
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-59679"]
Threat ID: 6a83336dbf8831d5392a7e5b
Added to database: 08/17/2026, 16:14:37 UTC
Last enriched: 09/25/2026, 05:10:44 UTC
Last updated: 10/02/2026, 02:46:04 UTC
Views: 57
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