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. 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 issued a security advisory with updated packages to address these issues. The vulnerabilities are rated as important by Red Hat Product Security. Users of affected Red Hat Enterprise Linux 9 variants are advised to apply the provided updates to remediate these security flaws.
AI Analysis
Technical Summary
The libXfont2 runtime library for X.Org X11 contains two security flaws: CVE-2026-59679, an out-of-bounds read/write vulnerability in the Font Server Client encoding, and CVE-2026-44950, a privilege escalation vulnerability caused by a heap buffer overflow in the Font Server Client. These vulnerabilities could allow an attacker to read or write memory out of bounds and escalate privileges on affected systems. Red Hat has issued an important security advisory (RHSA-2026:55447) with updated packages for Red Hat Enterprise Linux 9 to remediate these issues.
Potential Impact
Successful exploitation of these vulnerabilities could lead to unauthorized memory access and privilege escalation on affected Red Hat Enterprise Linux 9 systems. This could compromise system security by allowing attackers to execute code with elevated privileges or cause denial of service. However, there are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated libXfont2 packages for Red Hat Enterprise Linux 9 to address these vulnerabilities. Users should apply the security updates as described in the Red Hat advisory RHSA-2026:55447 and the update instructions at https://access.redhat.com/articles/11258. Applying these official patches fully mitigates the vulnerabilities. No additional mitigation actions 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. 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 issued a security advisory with updated packages to address these issues. The vulnerabilities are rated as important by Red Hat Product Security. Users of affected Red Hat Enterprise Linux 9 variants are advised to apply the provided updates to remediate these security flaws.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The libXfont2 runtime library for X.Org X11 contains two security flaws: CVE-2026-59679, an out-of-bounds read/write vulnerability in the Font Server Client encoding, and CVE-2026-44950, a privilege escalation vulnerability caused by a heap buffer overflow in the Font Server Client. These vulnerabilities could allow an attacker to read or write memory out of bounds and escalate privileges on affected systems. Red Hat has issued an important security advisory (RHSA-2026:55447) with updated packages for Red Hat Enterprise Linux 9 to remediate these issues.
Potential Impact
Successful exploitation of these vulnerabilities could lead to unauthorized memory access and privilege escalation on affected Red Hat Enterprise Linux 9 systems. This could compromise system security by allowing attackers to execute code with elevated privileges or cause denial of service. However, there are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated libXfont2 packages for Red Hat Enterprise Linux 9 to address these vulnerabilities. Users should apply the security updates as described in the Red Hat advisory RHSA-2026:55447 and the update instructions at https://access.redhat.com/articles/11258. Applying these official patches fully mitigates the vulnerabilities. No additional mitigation actions 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"]
- Cvss Version
- null
Threat ID: 6a83336dbf8831d5392a7e5b
Added to database: 08/17/2026, 16:14:37 UTC
Last enriched: 08/17/2026, 16:35:40 UTC
Last updated: 08/18/2026, 02:41:00 UTC
Views: 6
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