CVE-2014-3638: The bus_connections_check_reply function in config-parser.c in D-Bus before 1.6.24 and 1.8.x before 1.8.8 allo

Q: How do I fix CVE-2014-3638?

d-bus: upgrade to newer than 1.6.22; dbus: mitigate or apply the listed mitigation; opensuse: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2014-3638 being exploited?

CVE-2014-3638 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2014-3638 affect?

CVE-2014-3638 affects d-bus, dbus, opensuse. Severity is low (CVSS 2.1). The bus_connections_check_reply function in config-parser.c in D-Bus before 1.6.24 and 1.8.x before 1.8.8 allows local users to cause a denial of service (CPU consumption) via a large number of method calls.

Q: How urgent is CVE-2014-3638?

Priority 16/100. No elevated risk signals yet.

Routine

LOW 2.1UPGRADEMITIGATEMITIGATE

CVE-2014-3638 is a low-severity flaw (CVSS 2.1) affecting d-bus, dbus, opensuse. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The bus_connections_check_reply function in config-parser.c in D-Bus before 1.6.24 and 1.8.x before 1.8.8 allows local users to cause a denial of service (CPU consumption) via a large number of method calls.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	2.1 (Low)
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-399
Published	2014-09-22
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: d-bus project · freedesktop · opensuse

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2014-09-22 15:55 UTCPublished CVE record published
2026-06-17 00:08 UTCUpdated Record last modified

d-bus project d-bus UPGRADE

Affected: <= 1.6.22

Fixed in: newer than 1.6.22

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy d-bus || rpm -q d-bus || d-bus --version

2. UPGRADE to newer than 1.6.22 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade d-bus

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade d-bus

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

freedesktop dbus MITIGATE

Affected: 1.6.0 · 1.6.2 · 1.6.4 · 1.6.6 · 1.6.8 · 1.6.10 · 1.6.12 · 1.6.14

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy dbus || rpm -q dbus || dbus --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Downgrade not recommended

This is a core system component: downgrading can break the OS. Apply the distro update or the vendor mitigation.

opensuse opensuse MITIGATE

Affected: 12.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 12.3

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2014-3638?

d-bus: upgrade to newer than 1.6.22; dbus: mitigate or apply the listed mitigation; opensuse: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2014-3638 being exploited?

CVE-2014-3638 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2014-3638 affect?

CVE-2014-3638 affects d-bus, dbus, opensuse. Severity is low (CVSS 2.1). The bus_connections_check_reply function in config-parser.c in D-Bus before 1.6.24 and 1.8.x before 1.8.8 allows local users to cause a denial of service (CPU consumption) via a large number of method calls.

How urgent is CVE-2014-3638?

Priority 16/100. No elevated risk signals yet.

Related CVEs

CVE-2014-3639 LOW 2.1 MITIGATE UPGRADE The dbus-daemon in D-Bus before 1.6.24 and 1.8.x before 1.8.8 does not properly close old connections, which a
CVE-2014-3636 LOW 1.9 UPGRADE MITIGATE D-Bus 1.3.0 through 1.6.x before 1.6.24 and 1.8.x before 1.8.8 allows local users to (1) cause a denial of ser
CVE-2014-3635 MEDIUM 4.4 UPGRADE MITIGATE Off-by-one error in D-Bus 1.3.0 through 1.6.x before 1.6.24 and 1.8.x before 1.8.8, when running on a 64-bit s
CVE-2014-3477 MEDIUM 4.0 DOWNGRADE MITIGATE The dbus-daemon in D-Bus 1.2.x through 1.4.x, 1.6.x before 1.6.20, and 1.8.x before 1.8.4, sends an AccessDeni

References

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