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Slackware 15.0 libarchive Critical Buffer Overflow Vuln 2026-103-01

slackware
Calendar Grey April 13, 2026
Dist Slackware Esm H88
New libarchive packages for Slackware fix critical issues allowing remote access and buffer overflows. Upgrade recommended.
New libarchive packages are available for Slackware 15.0 and -current to fix security issues.

Summary

Here are the details from the Slackware 15.0 ChangeLog: patches/packages/libarchive-3.8.7-i586-1_slack15.0.txz: Upgraded. Libarchive 3.8.7 is a security and bugfix release. Notable fixes: CAB: fix NULL pointer dereference during skip (#2900) CAB: Fix Heap OOB Write in CAB LZX decoder (#2919) cpio: various fixes and improvements (#2899, #2908, #2910, #2939) contrib/untar: fix out-of-bounds read (#2903) iso9660: fix undefined behavior (#2897) iso9660: fix posibble heap buffer overflow on 32-bit systems (#2934) libarchive: fix handling of option failures (#2871) libarchive: do not continue with truncated numbers (#2911) libarchive: lzop and grzip filter support (#2947) RAR: fix LZSS window size mismatch after PPMd block (#2898) (* Security fix *)

Topics%20covered

Topics Covered

security advisory buffer overflow critical remote access slackware libarchive

Where Find New Packages

Thanks to the friendly folks at the OSU Open Source Lab (http://osuosl.org) for donating FTP and rsync hosting to the Slackware project! :-)
Also see the "Get Slack" section on http://slackware.com for additional mirror sites near you.
Updated package for Slackware 15.0: ftp://ftp.slackware.com/pub/slackware/slackware-15.0/patches/packages/libarchive-3.8.7-i586-1_slack15.0.txz
Updated package for Slackware x86_64 15.0: ftp://ftp.slackware.com/pub/slackware/slackware64-15.0/patches/packages/libarchive-3.8.7-x86_64-1_slack15.0.txz
Updated package for Slackware -current: ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/l/libarchive-3.8.7-i686-1.txz
Updated package for Slackware x86_64 -current: ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/l/libarchive-3.8.7-x86_64-1.txz

MD5 Signatures

Slackware 15.0 package: 7876af266a94cbedca91db264fb5bdf7 libarchive-3.8.7-i586-1_slack15.0.txz
Slackware x86_64 15.0 package: 89184aa36a2741523781e2b57645ca01 libarchive-3.8.7-x86_64-1_slack15.0.txz
Slackware -current package: d8c225f39d6a48bfbb8bd8a7b50e4c89 l/libarchive-3.8.7-i686-1.txz
Slackware x86_64 -current package: 9914a5e0ae8dc66d688031ed48f26b14 l/libarchive-3.8.7-x86_64-1.txz

Severity
critical
Lowest
Low
Medium
High
Critical

Topics%20covered

Topics Covered

security advisory buffer overflow critical remote access slackware libarchive

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Installation Instructions

Installation instructions: Upgrade the package as root: # upgradepkg libarchive-3.8.7-i586-1_slack15.0.txz

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