What’s Vulnerable › Vulnerabilities

CVE-2026-4367: Libxpm: libxpm: denial of service via out-of-bounds read in xpm file parsing

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-16 · updated 2026-07-28
• Weakness: CWE-125

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.

Affected products

• Red Hat Enterprise Linux 10: all versions
• Red Hat Enterprise Linux 6: all versions
• Red Hat Enterprise Linux 7: all versions
• Red Hat Enterprise Linux 8: all versions
• Red Hat Enterprise Linux 9: all versions
• Red Hat Hardened Images: all versions — fixed in 3.5.17-7.2.hum1, 3.5.19-4.hum1

How to fix

Upgrade to a fixed version: Red Hat Hardened Images 3.5.17-7.2.hum1, 3.5.19-4.hum1. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2026:30354
• https://access.redhat.com/errata/RHSA-2026:47072
• https://access.redhat.com/security/cve/CVE-2026-4367
• https://bugzilla.redhat.com/show_bug.cgi?id=2448984
• https://gitlab.freedesktop.org/xorg/lib/libxpm/-/commit/5448e1bd
• https://seclists.org/oss-sec/2026/q2/192
• http://www.openwall.com/lists/oss-security/2026/04/21/3

Get alerted when CVE-2026-4367 or the next vulnerability affects your stack