Red Hat Security Advisory: libXfont2 security update
X.Org X11 libXfont2 runtime library Security Fix(es): * libXfont2: BitmapScaleBitmaps Integer Overflow Heap Buffer Overflow (CVE-2026-56001) * libXfont2: PCF Font Parsing Heap Buffer Overflow (CVE-2026-56002) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
The libXfont2 runtime library in X.Org X11 contains two security flaws: an integer overflow in BitmapScaleBitmaps that results in a heap buffer overflow (CVE-2026-56001), and a heap buffer overflow in PCF font parsing (CVE-2026-56002). These vulnerabilities could potentially lead to memory corruption. Red Hat has released updated libXfont2 packages for Red Hat Enterprise Linux 10 and its variants to fix these issues. The advisory RHSA-2026:47079 provides details on the affected products and update instructions. No CVSS score is provided, but the issues are rated as important/high severity by Red Hat.
Potential Impact
The vulnerabilities involve heap buffer overflows that could lead to memory corruption within the libXfont2 library, potentially affecting the stability and security of systems running vulnerable versions of Red Hat Enterprise Linux 10. The exact impact details and exploitability are not specified, and no known exploits are reported in the wild at this time.
Mitigation Recommendations
Red Hat has released updated libXfont2 packages that address these vulnerabilities. Users of Red Hat Enterprise Linux 10 and related variants should apply the security updates as detailed in Red Hat advisory RHSA-2026:47079. For update instructions, refer to https://access.redhat.com/articles/11258. Applying these official patches is the recommended and effective mitigation.
Red Hat Security Advisory: libXfont2 security update
Description
X.Org X11 libXfont2 runtime library Security Fix(es): * libXfont2: BitmapScaleBitmaps Integer Overflow Heap Buffer Overflow (CVE-2026-56001) * libXfont2: PCF Font Parsing Heap Buffer Overflow (CVE-2026-56002) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The libXfont2 runtime library in X.Org X11 contains two security flaws: an integer overflow in BitmapScaleBitmaps that results in a heap buffer overflow (CVE-2026-56001), and a heap buffer overflow in PCF font parsing (CVE-2026-56002). These vulnerabilities could potentially lead to memory corruption. Red Hat has released updated libXfont2 packages for Red Hat Enterprise Linux 10 and its variants to fix these issues. The advisory RHSA-2026:47079 provides details on the affected products and update instructions. No CVSS score is provided, but the issues are rated as important/high severity by Red Hat.
Potential Impact
The vulnerabilities involve heap buffer overflows that could lead to memory corruption within the libXfont2 library, potentially affecting the stability and security of systems running vulnerable versions of Red Hat Enterprise Linux 10. The exact impact details and exploitability are not specified, and no known exploits are reported in the wild at this time.
Mitigation Recommendations
Red Hat has released updated libXfont2 packages that address these vulnerabilities. Users of Red Hat Enterprise Linux 10 and related variants should apply the security updates as detailed in Red Hat advisory RHSA-2026:47079. For update instructions, refer to https://access.redhat.com/articles/11258. Applying these official patches is the recommended and effective mitigation.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:47079
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-56002"]
- State
- PUBLISHED
Threat ID: 6a6940099c2644c7f8665d91
Added to database: 07/28/2026, 23:49:29 UTC
Last enriched: 08/07/2026, 00:57:42 UTC
Last updated: 09/11/2026, 22:08:23 UTC
Views: 44
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