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.
Problem types
Product status
Timeline
| 2026-03-19: | Reported to Red Hat. |
| 2026-04-21: | Made public. |
Credits
Red Hat would like to thank Naoki Wakamatsu (JPCERT/CC Vulnerability Coordination Group) for reporting this issue.
References
www.openwall.com/lists/oss-security/2026/04/21/3
access.redhat.com/security/cve/CVE-2026-4367
bugzilla.redhat.com/show_bug.cgi?id=2448984 (RHBZ#2448984)
gitlab.freedesktop.org/xorg/lib/libxpm/-/commit/5448e1bd
seclists.org/oss-sec/2026/q2/192