Vulnerability · Published Oct 21, 2026 · Assigned by redhat
CVE-2026-114038Device-mapper-multipath: device-mapper-multipath: information disclosure via malformed format string
Medium 5.1
In plain English
A medium-severity out-of-bounds read in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
A flaw was found in device-mapper-multipath. A local user can trigger an out-of-bounds read by sending a command with a format string ending in a trailing percent character to the multipath daemon. This issue can allow the user to expose unintended daemon memory, leading to information disclosure, or cause the daemon to crash, resulting in a Denial of Service (DoS).
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | multipath-tools | no fix listed | DEBIAN-CVE-2026-114038 |
| Debian:13 | multipath-tools | no fix listed | DEBIAN-CVE-2026-114038 |
| Debian:14 | multipath-tools | 0.15.1-1 | DEBIAN-CVE-2026-114038 |
| Ubuntu:22.04:LTS | multipath-tools | no fix listed | UBUNTU-CVE-2026-114038 |
| Ubuntu:24.04:LTS | multipath-tools | no fix listed | UBUNTU-CVE-2026-114038 |
| Ubuntu:26.04:LTS | multipath-tools | no fix listed | UBUNTU-CVE-2026-114038 |
| Ubuntu:26.10 | multipath-tools | no fix listed | UBUNTU-CVE-2026-114038 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 6 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
| Red Hat | Red Hat OpenShift Container Platform 4 | see references |
| Red Hat | Red Hat OpenShift Container Platform 5 | see references |
Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
References
- https://access.redhat.com/security/cve/CVE-2026-114038 vdb-entry, x_refsource_REDHAT
- RHBZ#2469787 issue-tracking, x_refsource_REDHAT