CVE-2014-3683: Integer overflow in rsyslog before 7.6.7 and 8.x before 8.4.2 and sysklogd 1.5 and earlier allows remote attac

Q: How do I fix CVE-2014-3683?

rsyslog: upgrade to newer than 7.6.6; sysklogd: upgrade to newer than 1.5. Exact commands for each OS are on this page.

Q: Is CVE-2014-3683 being exploited?

CVE-2014-3683 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-2014-3683 affect?

CVE-2014-3683 affects rsyslog, sysklogd. Severity is medium (CVSS 5.0). Integer overflow in rsyslog before 7.6.7 and 8.x before 8.4.2 and sysklogd 1.5 and earlier allows remote attackers to cause a denial of service (crash) via a large priority (PRI) value. NOTE: this vulnerability exists because of an incompl

Q: How urgent is CVE-2014-3683?

Priority 45/100. EPSS top 8%: very likely to be exploited; Public exploit reference

This month

MEDIUM 5.0UPGRADEUPGRADE

CVE-2014-3683 is a medium-severity flaw (CVSS 5.0) affecting rsyslog, sysklogd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Integer overflow in rsyslog before 7.6.7 and 8.x before 8.4.2 and sysklogd 1.5 and earlier allows remote attackers to cause a denial of service (crash) via a large priority (PRI) value. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-3634.

Why this priority

EPSS top 8%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	4.6% (top 8%)
CISA exploited list	No
Weakness	CWE-189
Published	2014-11-02
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: rsyslog · sysklogd project

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

Am I affected?

Timeline

2014-11-02 00:55 UTCPublished CVE record published
2026-06-17 00:08 UTCUpdated Record last modified

rsyslog rsyslog UPGRADE

Affected: <= 7.6.6 · 8.1.0 · 8.1.1 · 8.1.2 · 8.1.3 · 8.1.4 · 8.1.5 · 8.1.6

Fixed in: newer than 7.6.6

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 7.6.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade rsyslog

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rsyslog

Note

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

sysklogd project sysklogd UPGRADE

Affected: <= 1.5 · 1.1 · 1.2 · 1.3 · 1.4 · 1.4.1

Fixed in: newer than 1.5

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade sysklogd

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sysklogd

Note

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

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-2014-3683?

rsyslog: upgrade to newer than 7.6.6; sysklogd: upgrade to newer than 1.5. Exact commands for each OS are on this page.

Is CVE-2014-3683 being exploited?

CVE-2014-3683 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-2014-3683 affect?

CVE-2014-3683 affects rsyslog, sysklogd. Severity is medium (CVSS 5.0). Integer overflow in rsyslog before 7.6.7 and 8.x before 8.4.2 and sysklogd 1.5 and earlier allows remote attackers to cause a denial of service (crash) via a large priority (PRI) value. NOTE: this vulnerability exists because of an incompl

How urgent is CVE-2014-3683?

Priority 45/100. EPSS top 8%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2026-19654 HIGH 7.5 UPGRADE MITIGATE A unauthenticated remote peer may lead rsyslogd to crash due to a flaw in the optional imptcp module
CVE-2019-17042 CRITICAL 9.8 DOWNGRADE MITIGATE An issue was discovered in Rsyslog v8.1908.0
CVE-2019-17041 CRITICAL 9.8 DOWNGRADE MITIGATE An issue was discovered in Rsyslog v8.1908.0
CVE-2019-17040 CRITICAL 9.8 DOWNGRADE contrib/pmdb2diag/pmdb2diag.c in Rsyslog v8.1908.0 allows out-of-bounds access because the level length is mis
CVE-2018-16881 HIGH 7.5 UPGRADE DOWNGRADE A denial of service vulnerability was found in rsyslog in the imptcp module

References

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