CVE-2026-4367
Published: April 23, 2026Last modified: April 29, 2026
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | libxpm | Fixed (3.5.19-r0) |
| 25 LTS | libxpm | Fixed (3.5.19-r0) | |
| Stream | libxpm | Fixed (3.5.19-r0) |
References
- http://www.openwall.com/lists/oss-security/2026/04/21/3
- 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