Out-of-bounds Read in Red Hat Enterprise Linux 10
CVE-2026-4367
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (3.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 3.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.000
Affected products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Hardened Images — versions 3.5.17-7.2.hum1, 3.5.19-4.hum1
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-4367 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- gitlab.freedesktop.org/xorg/lib/libxpm/-/commit/5448e1bd
- seclists.org/oss-sec/2026/q2/192
- af854a3a-2127-422b-91ae-364da2661108
- access.redhat.com/errata/RHSA-2026:30354 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:47072 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-4367?
- CVE-2026-4367 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2026-06-16.
- How severe is CVE-2026-4367?
- Medium severity. CVSS v3 base score is 5.5 out of 10.