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CVE-2026-114038

Device-mapper-multipath: device-mapper-multipath: information disclosure via malformed format string

5.1 MediumFix available

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).

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
None
Availability
Low

Exploit likelihood

0.12%Unchanged since Oct 21, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.1

Device-mapper-multipath: device-mapper-multipath: information disclosure via malformed format string

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).

Record
CVE-2026-114038
CVSS 3.1
5.1 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Weakness
CWE-125
Updated
2026-11-05
EUVDEUVD-2026-106990 5.1

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).

Record
EUVD-2026-106990
CVSS 3.1
5.1 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Updated
2026-11-05
GitHub AdvisoriesGHSA-7rmr-p966-7g82 5.1

A flaw was found in device-mapper-multipath. A local user can trigger an out-of-bounds read by...

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).

Record
GHSA-7rmr-p966-7g82
CVSS 3.1
5.1 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Weakness
CWE-125
Updated
2026-11-02
NVD 5.1

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).

Record
CVE-2026-114038
CVSS 3.1
5.1 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Weakness
CWE-125
Updated
2026-11-05
OSVDEBIAN-CVE-2026-114038 5.1

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).

Record
DEBIAN-CVE-2026-114038
CVSS 3.1
5.1 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Updated
2026-11-04
OSVOESA-2026-4715 5.1

multipath-tools security update

This package provides the multipath tool and the multipathd daemon to manage dm-multipath devices. multipath can detect and set up multipath maps. multipathd sets up multipath maps automatically, monitors path devices for failure, removal, or addition, and applies the necessary changes to the multipath maps to ensure continuous availability of the map devices.

Security Fix(es):

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).(CVE-2026-114038)

Record
OESA-2026-4715
CVSS 3.1
5.1 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Updated
2026-11-04
OSVOESA-2026-4716 5.1

multipath-tools security update

This package provides the multipath tool and the multipathd daemon to manage dm-multipath devices. multipath can detect and set up multipath maps. multipathd sets up multipath maps automatically, monitors path devices for failure, removal, or addition, and applies the necessary changes to the multipath maps to ensure continuous availability of the map devices.

Security Fix(es):

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).(CVE-2026-114038)

Record
OESA-2026-4716
CVSS 3.1
5.1 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Updated
2026-11-04
OSVOESA-2026-4717 5.1

multipath-tools security update

This package provides the multipath tool and the multipathd daemon to manage dm-multipath devices. multipath can detect and set up multipath maps. multipathd sets up multipath maps automatically, monitors path devices for failure, removal, or addition, and applies the necessary changes to the multipath maps to ensure continuous availability of the map devices.

Security Fix(es):

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).(CVE-2026-114038)

Record
OESA-2026-4717
CVSS 3.1
5.1 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Updated
2026-11-04
OSVUBUNTU-CVE-2026-114038 5.1

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).

Record
UBUNTU-CVE-2026-114038
CVSS 3.1
5.1 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
multipath-tools
Debian:12
All versions, plus listed versions
0.10.0-10.11.1-10.11.1-20.11.1-30.11.1-4
Show 26 moreShow less
0.12.0-10.13.0-10.14.3-10.14.3-20.14.3-30.14.3-40.15.0-10.15.1-10.9.4-100.9.4-30.9.4-3+deb12u10.9.4-3+deb12u20.9.4-40.9.4-50.9.4-60.9.4-70.9.4-80.9.4-90.9.7-10.9.7-20.9.7-30.9.7-40.9.7-60.9.7-70.9.8-10.9.9-1
None known
multipath-tools
Debian:13
All versions, plus listed versions
0.11.1-20.11.1-30.11.1-40.12.0-10.13.0-1
Show 6 moreShow less
0.14.3-10.14.3-20.14.3-30.14.3-40.15.0-10.15.1-1
None known
multipath-tools
Debian:14
before 0.15.1-1, plus listed versions
0.11.1-20.11.1-30.11.1-40.12.0-10.13.0-1
Show 5 moreShow less
0.14.3-10.14.3-20.14.3-30.14.3-40.15.0-1
0.15.1-1
multipath-tools
openEuler:22.03-LTS-SP4
before 0.8.7-30.oe2203sp4
0.8.7-30.oe2203sp4
multipath-tools
openEuler:24.03-LTS-SP1
before 0.9.5-22.oe2403sp1
0.9.5-22.oe2403sp1
multipath-tools
openEuler:24.03-LTS-SP3
before 0.9.5-22.oe2403sp3
0.9.5-22.oe2403sp3
multipath-tools
Ubuntu:14.04:LTS
All versions, plus listed versions
0.4.9-3ubuntu70.4.9-3ubuntu7.20.4.9-3ubuntu7.40.4.9-3ubuntu7.60.4.9-3ubuntu7.7
Show 7 moreShow less
0.4.9-3ubuntu7.90.4.9-3ubuntu7.110.4.9-3ubuntu7.120.4.9-3ubuntu7.130.4.9-3ubuntu7.140.4.9-3ubuntu7.150.4.9-3ubuntu7.16
None known
multipath-tools
Ubuntu:16.04:LTS
All versions, plus listed versions
0.5.0-7ubuntu70.5.0-7ubuntu80.5.0-7ubuntu90.5.0-7ubuntu100.5.0-7ubuntu11
Show 11 moreShow less
0.5.0-7ubuntu120.5.0-7ubuntu140.5.0-7ubuntu150.5.0-7ubuntu160.5.0+git1.656f8865-5ubuntu10.5.0+git1.656f8865-5ubuntu20.5.0+git1.656f8865-5ubuntu2.10.5.0+git1.656f8865-5ubuntu2.20.5.0+git1.656f8865-5ubuntu2.30.5.0+git1.656f8865-5ubuntu2.40.5.0+git1.656f8865-5ubuntu2.5
None known
multipath-tools
Ubuntu:18.04:LTS
All versions, plus listed versions
0.6.4-5ubuntu10.7.4-2ubuntu10.7.4-2ubuntu30.7.4-2ubuntu3.10.7.4-2ubuntu3.2
None known
multipath-tools
Ubuntu:20.04:LTS
All versions, plus listed versions
0.7.9-3ubuntu60.7.9-3ubuntu70.8.3-1ubuntu10.8.3-1ubuntu20.8.3-1ubuntu2.10.8.3-1ubuntu2.20.8.3-1ubuntu2.30.8.3-1ubuntu2.4
None known
Show 4 moreShow less
Affected packages
PackageAffectedFixed
multipath-tools
Ubuntu:22.04:LTS
All versions, plus listed versions
0.8.5-2ubuntu20.8.5-2ubuntu30.8.8-1ubuntu10.8.8-1ubuntu1.22.04.10.8.8-1ubuntu1.22.04.30.8.8-1ubuntu1.22.04.4
None known
multipath-tools
Ubuntu:24.04:LTS
All versions, plus listed versions
0.9.4-5ubuntu30.9.4-5ubuntu60.9.4-5ubuntu70.9.4-5ubuntu80.9.4-5ubuntu8.10.9.4-5ubuntu8.2
None known
multipath-tools
Ubuntu:26.10
All versions, plus listed versions
0.14.3-2ubuntu10.14.3-3ubuntu10.14.3-3ubuntu2
None known
multipath-tools
Ubuntu:26.04:LTS
All versions, plus listed versions
0.11.1-3ubuntu20.12.0-1ubuntu10.12.0-1ubuntu20.12.0-1ubuntu30.14.3-2ubuntu1
None known

History

History
RecordedChangedSources
affected, aliases, referencesEUVD, NVD, OSV
facts, productsCVE List
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-114038 is a medium vulnerability (CVSS 5.1) in Red Hat Enterprise Linux 10, published October 21, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.12%, the 1st percentile. Fixed in multipath-tools 0.15.1-1.

References

Show 5 moreShow less
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