CVE-2026-14164

Name	CVE-2026-14164
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-4762-1
Debian Bugs	1141180

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libarchive (PTS)	bookworm	3.6.2-1+deb12u4	vulnerable
	bookworm (security)	3.6.2-1+deb12u5	fixed
	trixie	3.7.4-4+deb13u1	vulnerable
	forky, sid	3.8.9-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin	Debian Bugs
libarchive	source	bullseye	3.4.3-2+deb11u5	DLA-4762-1
libarchive	source	bookworm	3.6.2-1+deb12u5	DLA-4762-1
libarchive	source	(unstable)	3.8.8-1		1141180

Notes

[trixie] - libarchive <no-dsa> (Minor issue)
https://github.com/libarchive/libarchive/issues/3069
https://github.com/libarchive/libarchive/pull/3071
https://github.com/libarchive/libarchive/commit/1c914cdfef533cbee1ae3aa21a89ba02ed4d5f61 (master)
https://github.com/libarchive/libarchive/commit/f774f03b40cb109348e5c6d52b59c864e3cfa8e8 (v3.8.8)