CVE-2026-4367 Libxpm: libxpm: denial of service via out-of-bounds read in xpm file parsing
A local attacker can cause a denial of service by tricking an application into processing a maliciously crafted XPM image file.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-4367?
CVE-2026-4367 is a medium-severity denial of service vulnerability in Red Hat Enterprise Linux 10, published on 16 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw was found in libXpm. A local user with low privileges could exploit an Out-of-Bounds Read vulnerability in the `xpmNextWord()` function by processing a specially crafted or very small XPM (X PixMap) image file. This improper validation of file boundaries can cause an internal pointer to read beyond the file's end, leading to application crashes and Denial of Service conditions.
Weakness: CWE-125
Which versions are affected by CVE-2026-4367?
Linux distribution packages (6)
libXpm Red Hat:hummingbird:1 | All versions | 0:3.5.17-7.2.hum1 |
libXpm-devel Red Hat:hummingbird:1 | All versions | 0:3.5.17-7.2.hum1 |
libXpm SUSE:Linux Enterprise Server 16.0 | All versions | 3.5.17-160000.3.1 |
libXpm SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 3.5.17-160000.3.1 |
libXpm openSUSE:Leap 16.0 | All versions | 3.5.17-160000.3.1 |
libXpm openSUSE:Tumbleweed | All versions | 3.5.18-2.1 |
How do I fix CVE-2026-4367?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-4367 being exploited?
There is no known exploitation of CVE-2026-4367 in the wild and no public exploit code.
Sources
Also known as ALPINE-CVE-2026-4367, AZL-90198, BELL-CVE-2026-4367, DEBIAN-CVE-2026-4367, ECHO-0d21-3249-4af2, GHSA-c2rx-36v4-qc8g and 9 more.