RHSA-2026:55448 Red Hat Security Advisory: libXfont2 security update

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RHSA-2026:55447 Red Hat Security Advisory: libXfont2 security update

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CVE-2026-71391

A flaw was found in GNU Emacs, specifically in GNU Emacs for Android. An off-by-one error can occur when a specially crafted font file is processed due to an improper bounds check. This can cause a heap-based buffer over-read, exposing heap memory contents. Mitigation Do not load untrusted font...

DEBIAN-CVE-2026-71391

GNU Emacs for Android contains an off-by-one error in the gvar table parser in src/sfnt.c. The shared-coordinate index boundary check in sfntvarysimpleglyph and sfntvarycompoundglyph uses a strict greater-than comparison instead of greater-than-or-equal, allowing a crafted TrueType variable font ...

CVE-2026-71394 Heap Use of Uninitialized Memory in GNU Emacs for Android

GNU Emacs for Android improperly validates the table header input in sfntreadtabledirectory in src/sfnt.c. Due to an incorrect comparison variable in the read-length check, a crafted font file that claims to contain more table directory entries than actually present causes the parser to return a...

CVE-2026-71393 Heap Buffer Overflow in GNU Emacs for Android

GNU Emacs for Android is vulnerable to an integer overflow in sfntreadnametable in src/sfnt.c. The function computes an allocation size using a 32-bit length value from a TrueType font file without overflow checking. On 32-bit targets, a crafted font causes the calculation to wrap, resulting in a...

CVE-2026-71392

GNU Emacs for Android is vulnerable to an integer overflow in the sfntreadcmapformat12 function in src/sfnt.c. When processing a crafted TrueType font file, an unguarded addition in the xmalloc allocation call wraps around on 32-bit builds, causing a heap buffer overflow write. An attacker can...

CVE-2026-71391

GNU Emacs for Android is affected by an off-by-one in the gvar table parser (src/sfnt.c). The shared-coordinate index boundary check in sfnt_vary_simple_glyph() and sfnt_vary_compound_glyph() uses a > comparison instead of >=, allowing a crafted TrueType variable font to bypass the check an...

CVE-2026-71391 Off-by-One Error in GNU Emacs for Android

GNU Emacs for Android contains an off-by-one error in the gvar table parser in src/sfnt.c. The shared-coordinate index boundary check in sfntvarysimpleglyph and sfntvarycompoundglyph uses a strict greater-than comparison instead of greater-than-or-equal, allowing a crafted TrueType variable font ...

GHSA-FP3F-MC75-235C pypdf: Possible large memory usage for large /ToUnicode streams

Impact An attacker who uses this vulnerability can craft a PDF which leads to large memory consumption. This requires parsing the /ToUnicode entry of a font with unusually large values, for example during text extraction. Patches This has been fixed in pypdf==6.15.0. Workarounds If you cannot...

pypdf: Possible large memory usage for large /ToUnicode streams

Impact An attacker who uses this vulnerability can craft a PDF which leads to large memory consumption. This requires parsing the /ToUnicode entry of a font with unusually large values, for example during text extraction. Patches This has been fixed in pypdf==6.15.0. Workarounds If you cannot...

CVE-2026-18497 The nothings stb TrueType library contains a heap buffer overflow vulnerability

A heap-buffer-overflow vulnerability exists in the nothings stb TrueType library, up to version 1.26, that is used for parsing TrueType font files. The vulnerability exists in the stbttGetGlyphShapeTT function within the nothings stbtruetype.h library when parsing malformed TTF TrueType Font file...

libXfont2: PCF Font Parsing Heap Buffer Overflow

A flaw was found in libXfont2. A specially crafted PCF Portable Compiled Format font file, when processed by libXfont2, can lead to a buffer overflow. This occurs because the font parsing process does not properly validate the size of a bitmap buffer against the glyph metrics provided in the...

Important: Red Hat Security Advisory: libXfont2 security update

An update for libXfont2 is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is...

libXfont2: PCF Font Parsing Heap Buffer Overflow

A flaw was found in libXfont2. A specially crafted PCF Portable Compiled Format font file, when processed by libXfont2, can lead to a buffer overflow. This occurs because the font parsing process does not properly validate the size of a bitmap buffer against the glyph metrics provided in the...

libXfont2 security update

An update is available for libXfont2. This update affects Rocky Linux 9. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list X.Org X11 libXfont2 runtime library Security Fixes: libXfont2:...

RHEL 9 : libXfont2 (RHSA-2026:47084)

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:47084 advisory. X.Org X11 libXfont2 runtime library Security Fixes: libXfont2: BitmapScaleBitmaps Integer Overflow Heap Buffer Overflow CVE-2026-56001...

MGASA-2026-0311 Updated libxfont2 packages fix security vulnerabilities

The updated packages fix security vulnerabilities: BitmapScaleBitmaps Integer Overflow Heap Buffer Overflow. CVE-2026-56001 PCF Font Parsing Heap Buffer Overflow. CVE-2026-56002 computeProps Property Buffer Heap Buffer Overflow. CVE-2026-56003...

libXfont2 security update

An update is available for libXfont2. This update affects Rocky Linux 10. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list X.Org X11 libXfont2 runtime library Security Fixes: libXfont2:...

libXfont2 security update

An update is available for libXfont2. This update affects Rocky Linux 8. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list X.Org X11 libXfont2 runtime library Security Fixes: libXfont2:...