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XZ Utils XZ Utils are a complete C99 implementation of the xz file format XZ Utils were originally written for POSIX systems but have been ported to a few non-POSIX systems as well
The Tukaani Project Git repositories Tukaani on GitHub The primary git repositories and released packages of the XZ projects are on GitHub Constructive comments in issues and pull requests are welcome from anyone; one doesn’t need to be an existing contributor! git tukaani org
liblzma (XZ Utils): liblzma (XZ Utils) - Tukaani liblzma (XZ Utils) liblzma is a general-purpose data compression library with a zlib-like API The native file format is xz, but also the old lzma format and raw (no headers) streams are supported Multiple compression algorithms (filters) are supported Currently LZMA2 is the primary filter liblzma is part of XZ Utils https: tukaani org xz
XZ Utils backdoor - Tukaani The XZ projects have been moved to their old URLs on tukaani org XZ Utils’s home page is under construction still though xz tukaani org DNS name (CNAME) has been removed and won’t be restored
CVE-2025-31115: Threaded . xz decoder frees memory too early In XZ Utils 5 3 3alpha to 5 8 0, the multithreaded xz decoder in liblzma has a bug where invalid input can at least result in a crash (CVE-2025-31115) The effects include heap use after free and writing to an address based on the null pointer plus an offset
XZ Utils - tukaani. org XZ Utils are a complete C99 implementation of the xz file format XZ Utils were originally written for POSIX systems but have been ported to a few non-POSIX systems as well
XZ Utils review notes - Tukaani The Capsicum code is slightly simpler and stricter than in xz because xzdec needs to do less Silently running without sandbox when kernel support is missing (ENOSYS) is an intentional feature and commonly accepted practice: without this, on such kernels xz wouldn’t run at all
Old XZ Utils releases - Tukaani The DOS versions of newer XZ Utils include some copylefted code from DJGPP 2 05 and CWSDPMI r7 The relevant source code is available from their home pages, and copies are also available below
liblzma (XZ Utils): lzma base. h File Reference liblzma 5 2 6 and earlier had a bug in single-threaded xz decoder (lzma_stream_decoder ()) which made it impossible to continue decoding after LZMA_MEMLIMIT_ERROR even if the limit was increased using lzma_memlimit_set ()
XZ for Java - Tukaani It has been reported that some vulnerability scanners incorrectly claim that one or more XZ Utils CVEs apply to XZ for Java Possibly the tools consider XZ Utils’ CPE cpe:2 3:a:tukaani:xz to match XZ for Java’s Maven coordinates org tukaani:xz