CVE-2026-44638: NULL Pointer Dereference

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. From to 1.8.7-r1, a wrong NULL check after an allocation call in sixeldecoderaw and sixeldecode causes a NULL pointer dereference whenever the allocation fails. The check tests the address of the output parameter alway...

Linux Distros Unpatched Vulnerability : CVE-2026-33020

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. Versions 1.8.7 and prior contain an integer overflow which leads to a heap buffer...

Linux Distros Unpatched Vulnerability : CVE-2026-33019

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. Versions 1.8.7 and prior contain an integer overflow leading to an out-of-bounds...

Linux Distros Unpatched Vulnerability : CVE-2026-33021

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. Versions 1.8.7 and prior contain a use-after-free vulnerability in...

Linux Distros Unpatched Vulnerability : CVE-2026-33018

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. Versions 1.8.7 and prior contain a Use-After-Free vulnerability via the loadgif...

Linux Distros Unpatched Vulnerability : CVE-2026-33023

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. In versions 1.8.7 and prior, when built with the --with-gdk-pixbuf2 option, a...

SUSE CVE-2026-33018

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. Versions 1.8.7 and prior contain a Use-After-Free vulnerability via the loadgif function in fromgif.c, where a single sixelframet object is reused across all frames of an animated GIF and gifinitframe unconditionally...

SUSE CVE-2026-33019

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. Versions 1.8.7 and prior contain an integer overflow leading to an out-of-bounds heap read in the --crop option handling of img2sixel, where positive coordinates up to INTMAX are accepted without overflow-safe bounds...

SUSE CVE-2026-33020

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. Versions 1.8.7 and prior contain an integer overflow which leads to a heap buffer overflow via sixelframeconverttorgb888 in frame.c, where allocation size and pointer offset computations for palettised images PAL1, PAL...

SUSE CVE-2026-33021

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. Versions 1.8.7 and prior contain a use-after-free vulnerability in sixelencoderencodebytes because sixelframeinit stores the caller-owned pixel buffer pointer directly in frame-pixels without making a defensive copy...

SUSE CVE-2026-33023

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. In versions 1.8.7 and prior, when built with the --with-gdk-pixbuf2 option, a use-after-free vulnerability exists in loadwithgdkpixbuf in loader.c. The cleanup path manually frees the sixelframet object and its interna...

CVE-2026-33018

A flaw was found in libsixel, a SIXEL encoder/decoder implementation. This Use-After-Free vulnerability occurs when processing specially crafted animated Graphics Interchange Format GIF files. A remote attacker could exploit this by providing a malicious multi-frame GIF, causing the application t...

CVE-2026-33020

A flaw was found in libsixel. An integer overflow vulnerability in the sixelframeconverttorgb888 function can lead to a heap buffer overflow when processing specially crafted large palettised PNG images. An attacker can exploit this by providing a malicious image, which causes heap corruption in...

CVE-2026-33019

A flaw was found in libsixel. An attacker can trigger an integer overflow in the image processing component, img2sixel, by supplying a specially crafted crop argument. This vulnerability leads to an out-of-bounds memory read, which can cause the application to crash, resulting in a Denial of...

CVE-2026-33021

A flaw was found in libsixel, a SIXEL encoder/decoder implementation. An attacker who controls incoming frames can exploit a use-after-free vulnerability. This occurs because a caller-owned pixel buffer is prematurely freed during a resize operation, leaving a dangling pointer. This can lead to a...

CVE-2026-33023

A flaw was found in libsixel, specifically when it is built with the gdk-pixbuf2 option. A remote attacker can exploit a use-after-free vulnerability by supplying a crafted image, which can lead to information disclosure, memory corruption, or arbitrary code execution. Mitigation Mitigation for...

CVE-2026-33023

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. In versions 1.8.7 and prior, when built with the --with-gdk-pixbuf2 option, a use-after-free vulnerability exists in loadwithgdkpixbuf in loader.c. The cleanup path manually frees the sixelframet object and its interna...

DEBIAN-CVE-2026-33021

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. Versions 1.8.7 and prior contain a use-after-free vulnerability in sixelencoderencodebytes because sixelframeinit stores the caller-owned pixel buffer pointer directly in frame-pixels without making a defensive copy...

DEBIAN-CVE-2026-33023

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. In versions 1.8.7 and prior, when built with the --with-gdk-pixbuf2 option, a use-after-free vulnerability exists in loadwithgdkpixbuf in loader.c. The cleanup path manually frees the sixelframet object and its interna...

CVE-2026-33021

libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. Versions 1.8.7 and prior contain a use-after-free vulnerability in sixelencoderencodebytes because sixelframeinit stores the caller-owned pixel buffer pointer directly in frame-pixels without making a defensive copy...