This update for squashfs fixes the following issues: * CVE-2015-4645,CVE-2015-4646: Multiple buffer overflows fixed in squashfs- tools * CVE-2021-40153: Fixed an issue where an attacker might have been able to write a file outside of destination * CVE-2021-41072: Fixed an issue where an attacker might have been able to write a file outside the destination directory via a symlink . update to 4.6.1: * Race condition which can cause corruption of the "fragment table" fixed. This is a regression introduced in August 2022, and it has been seen when tailend packing is used . * Fix build failure when the tools are being built without extended attribute support. * Fix XATTR error message when an unrecognised prefix is found * Fix incorrect free of pointer when an unrecognised XATTR prefix is found. * Major improvements in extended attribute handling, pseudo file handling, and miscellaneous new options and improvements * Extended attribute handling improved in Mksquashfs and Sqfstar * New Pseudo file xattr definition to add extended attributes to files. * New xattrs-add Action to add extended attributes to files * Extended attribute handling improved in Unsquashfs * Other major improvements * Unsquashfs can now output Pseudo files to standard out. * Mksquashfs can now input Pseudo files from standard in. * Squashfs filesystems can now be converted without unpacking to an intermediate filesystem or mounting, by piping the output of Unsquashfs to Mksquashfs. * Pseudo files are now supported by Sqfstar. * "Non-anchored" excludes are now supported by Unsquashfs. update to 4.5.1 : * This release adds Manpages for Mksquashfs, Unsquashfs, Sqfstar and Sqfscat. * The -help text output from the utilities has been improved and extended as well . * CVE-2021-41072 which is a writing outside of destination exploit, has been fixed. * The number of hard-links in the filesystem is now also displayed by Mksquashfs in the output summary. * The number of hard-links written by Unsquashfs is now also displayed in the output summary. * Unsquashfs will now write to a pre-existing destination directory, rather than aborting. * Unsquashfs now allows "." to used as the destination, to extract to the current directory. * The Unsquashfs progress bar now tracks empty files and hardlinks, in addition to data blocks. * -no-hardlinks option has been implemented for Sqfstar. * More sanity checking for "corrupted" filesystems, including checks for multiply linked directories and directory loops. * Options that may cause filesystems to be unmountable have been moved into a new "experts" category in the Mksquashfs help text . * Maximum cpiostyle filename limited to PATH_MAX. This prevents attempts to overflow the stack, or cause system calls to fail with a too long pathname. * Don"t always use "max open file limit" when calculating length of queues, as a very large file limit can cause Unsquashfs to abort. Instead use the smaller of max open file limit and cache size. * Fix Mksquashfs silently ignoring Pseudo file definitions when appending. * Don"t abort if no XATTR support has been built in, and there"s XATTRs in the filesystem. This is a regression introduced in 2019 in Version 4.4. * Fix duplicate check when the last file block is sparse. update to 4.5: * Mksquashfs now supports "Actions". * New sqfstar command which will create a Squashfs image from a tar archive. * Tar style handling of source pathnames in Mksquashfs. * Cpio style handling of source pathnames in Mksquashfs. * New option to throttle the amount of CPU and I/O. * Mksquashfs now allows no source directory to be specified. * New Pseudo file "R" definition which allows a Regular file o be created with data stored within the Pseudo file. * Symbolic links are now followed in extract files * Unsquashfs now supports "exclude" files. * Max depth traversal option added. * Unsquashfs can now output a "Pseudo file" representing the input Squashfs filesystem. * New -one-file-system option in Mksquashfs. * New -no-hardlinks option in Mksquashfs. * Exit code in Unsquashfs changed to distinguish between non-fatal errors , and fatal errors . * Xattr id count added in Unsquashfs "-stat" output. * Unsquashfs "write outside directory" exploit fixed. * Error handling in Unsquashfs writer thread fixed. * Fix failure to truncate destination if appending aborted. * Prevent Mksquashfs reading the destination file.