CVE-2026-15028

Name	CVE-2026-15028
Description	A flaw was found in libarchive. This vulnerability allows a remote attacker to trigger a heap overflow by providing a specially crafted tar archive. The issue occurs during the parsing of a PAX extended header containing a malformed SUN.holesdata sparse-file attribute. Successful exploitation could lead to a denial of service, making the system unavailable, or potentially allow for arbitrary code execution, giving the attacker control over the affected system.
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)
Debian Bugs	1142833

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libarchive (PTS)	bullseye	3.4.3-2+deb11u1	vulnerable
	bullseye (security)	3.4.3-2+deb11u4	vulnerable
	bookworm	3.6.2-1+deb12u4	vulnerable
	bookworm (security)	3.6.2-1+deb12u2	vulnerable
	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	Urgency	Origin	Debian Bugs
libarchive	source	(unstable)	3.8.9-1			1142833

Notes

[trixie] - libarchive <no-dsa> (Minor issue)
https://github.com/libarchive/libarchive/issues/3251
https://github.com/libarchive/libarchive/pull/3253
Fixed by: https://github.com/libarchive/libarchive/commit/f93abd161ec37326c566f4f0efcd44fe7a66dd95
Fixed by: https://github.com/libarchive/libarchive/commit/ffc1114f84953b9b9c79a36798e534d07194e85b (v3.8.9)