VDB
RHSA-2026:51062
RHSA-2026:51062
PUBLISHED
CVSS 7.300000190734863 HIGH
A flaw was found in libXfont2. In the BitmapScaleBitmaps() function, an integer overflow can occur when calculating the memory needed for font glyphs. This overflow leads to a heap buffer overflow, where a smaller-than-required memory buffer is allocated. A local attacker can exploit this by loading a specially crafted PCF font, potentially leading to arbitrary code execution or a denial of service.
Risk Scores
CVSS 3.1
7.300000190734863
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | libXfont2-debugsource-0:2.0.3-12.el9_2.1.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2) | 2.0.3-12.el9 |
| Red Hat | libXfont2-debuginfo-0:2.0.3-12.el9_2.1.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2) | 2.0.3-12.el9 |
| Red Hat | libXfont2-debuginfo-0:2.0.3-12.el9_2.1.i686 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2) | 2.0.3-12.el9 |
| Red Hat | libXfont2-0:2.0.3-12.el9_2.1.i686 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2) | 2.0.3-12.el9 |
| Red Hat | libXfont2-debugsource-0:2.0.3-12.el9_2.1.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2) | 2.0.3-12.el9 |
| Red Hat | libXfont2-debugsource-0:2.0.3-12.el9_2.1.i686 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2) | 2.0.3-12.el9 |
| Red Hat | libXfont2-0:2.0.3-12.el9_2.1.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2) | 2.0.3-12.el9 |
| Red Hat | libXfont2-0:2.0.3-12.el9_2.1.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2) | 2.0.3-12.el9 |
| Red Hat | libXfont2-debuginfo-0:2.0.3-12.el9_2.1.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2) | 2.0.3-12.el9 |
| Red Hat | libXfont2-debugsource-0:2.0.3-12.el9_2.1.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2) | 2.0.3-12.el9 |
| Red Hat | libXfont2-debugsource-0:2.0.3-12.el9_2.1.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2) | 2.0.3-12.el9 |
| Red Hat | libXfont2-debuginfo-0:2.0.3-12.el9_2.1.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2) | 2.0.3-12.el9 |
| Red Hat | libXfont2-debuginfo-0:2.0.3-12.el9_2.1.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2) | 2.0.3-12.el9 |
| Red Hat | libXfont2-0:2.0.3-12.el9_2.1.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2) | 2.0.3-12.el9 |
| Red Hat | libXfont2-0:2.0.3-12.el9_2.1.src as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2) | 2.0.3-12.el9 |
| Red Hat | libXfont2-0:2.0.3-12.el9_2.1.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2) | 2.0.3-12.el9 |
Timeline
- Aug 6, 2026 CVE Published
- Aug 6, 2026 CVE Updated
- Aug 6, 2026 Distribution Patch
- Aug 6, 2026 Distribution Patch
- Aug 6, 2026 Security Advisory
- Aug 6, 2026 Security Advisory
- Aug 6, 2026 Security Advisory
- Aug 6, 2026 Security Advisory
References
- https://access.redhat.com/errata/RHSA-2026:51062 advisory
- https://access.redhat.com/security/updates/classification/#important advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2496640 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2496641 issue
- https://bugzilla.redhat.com/show_bug.cgi?id=2496642 issue
- https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_51062.json advisory
- https://access.redhat.com/security/cve/CVE-2026-56001 advisory
- https://www.cve.org/CVERecord?id=CVE-2026-56001 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-56001 advisory
- https://access.redhat.com/security/cve/CVE-2026-56002 advisory
- https://www.cve.org/CVERecord?id=CVE-2026-56002 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-56002 advisory
- https://access.redhat.com/security/cve/CVE-2026-56003 advisory
- https://www.cve.org/CVERecord?id=CVE-2026-56003 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-56003 advisory