CVE-2026-15028 Libarchive: heap overflow oob read while parsing a tar archive contains a pax extended header
A heap overflow in Libarchive allows remote attackers to cause denial of service or execute arbitrary code via a crafted tar archive.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-15028?
CVE-2026-15028 is a low-severity memory corruption vulnerability in Red Hat Cost Management On-Premise 1, published on 10 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2026-15028?
Linux distribution packages (6)
bsdcat Red Hat:hummingbird:1 | All versions | 0:3.8.8-2.1.hum1 |
bsdcpio Red Hat:hummingbird:1 | All versions | 0:3.8.8-2.1.hum1 |
bsdtar Red Hat:hummingbird:1 | All versions | 0:3.8.8-2.1.hum1 |
bsdunzip Red Hat:hummingbird:1 | All versions | 0:3.8.8-2.1.hum1 |
libarchive Red Hat:hummingbird:1 | All versions | 0:3.8.8-2.1.hum1 |
libarchive-devel Red Hat:hummingbird:1 | All versions | 0:3.8.8-2.1.hum1 |
How do I fix CVE-2026-15028?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-15028 being exploited?
There is no known exploitation of CVE-2026-15028 in the wild and no public exploit code.
Sources
Also known as AZL-92331, DEBIAN-CVE-2026-15028, ECHO-9c03-a5ae-1691, GHSA-p59g-85vj-3mvf, RHSA-2026:38279, UBUNTU-CVE-2026-15028.