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Fedora 43 libsixel Critical Memory Leak CVE-2025

Linuxsecurity •LinuxSecurity Advisories • March 6, 2026

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An encoder/decoder implementation for DEC SIXEL graphics. Update Information : Apply fix for CVE-2025-61146

An encoder/decoder implementation for DEC SIXEL graphics.

Apply fix for CVE-2025-61146

* Wed Feb 25 2026 ErrorNoInternet - 1.10.5-5 - Apply fix for CVE-2025-61146

[ 1 ] Bug #2442029 - CVE-2025-61146 libsixel: memory leak in rpl_malloc() in malloc_stub.c [fedora-all]

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-b227fad171' at the command line. For more information, refer to the dnf documentation available at

The full story

This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Critical Memory Leak Vulnerability in Fedora libsixel Fixed A critical memory leak vulnerability, identified as CVE-2025-61146, has been discovered in the libsixel encoder/decoder implementation for DEC SIXEL graphics. This vulnerability affects Fedora 42 and Fedora 43, prompting immediate patching efforts to mitigate potential exploitation. 2 sources 64

Extracted Entities

CVEs (1)

CVE-2025-61146