CVE-2026-14164

A double free issue has been identified in libarchive's RAR5 reader. During parsing of a specially crafted RAR5 archive, the filtered_buf pointer may remain stale after being freed during unpacking state reinitialization. Subsequent processing of another archive entry can trigger a second free of the same memory region, resulting in a double-free condition. Successful exploitation may cause applications using the vulnerable libarchive API to terminate unexpectedly, leading to a denial of service.

• libarchive (bug https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1141180) https://github.com/libarchive/libarchive/issues/3069 https://github.com/libarchive/libarchive/pull/3071 https://github.com/libarchive/libarchive/commit/1c914cdfef533cbee1ae3aa21a89ba02ed4d5f61