CVE-2011-4093: Integer overflow in inc/server.hpp in libnet6 (aka net6) before 1.3.14 might allow remote attackers to hijack

Q: How do I fix CVE-2011-4093?

solaris: mitigate or apply the listed mitigation; net6: upgrade to newer than 1.3.13; opensuse: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2011-4093 being exploited?

CVE-2011-4093 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-2011-4093 affect?

CVE-2011-4093 affects solaris, net6, opensuse. Severity is medium (CVSS 5.8). Integer overflow in inc/server.hpp in libnet6 (aka net6) before 1.3.14 might allow remote attackers to hijack connections and gain privileges as other users by making a large number of connections until the overflow occurs and an ID of anot

Q: How urgent is CVE-2011-4093?

Priority 40/100. No elevated risk signals yet.

This month

MEDIUM 5.8MITIGATEUPGRADEMITIGATE

CVE-2011-4093 is a medium-severity flaw (CVSS 5.8) affecting solaris, net6, opensuse. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Integer overflow in inc/server.hpp in libnet6 (aka net6) before 1.3.14 might allow remote attackers to hijack connections and gain privileges as other users by making a large number of connections until the overflow occurs and an ID of another user is provided.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.8 (Medium)
EPSS exploit chance	1.8% (top 22%)
CISA exploited list	No
Weakness	CWE-190
Published	2014-02-10
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: armin burgmeier · opensuse · opensuse project · oracle

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2014-02-10 18:15 UTCPublished CVE record published
2026-06-16 23:34 UTCUpdated Record last modified

oracle solaris MITIGATE

Affected: 11.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.2

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.

armin burgmeier net6 UPGRADE

Affected: <= 1.3.13 · 1.3.1 · 1.3.2 · 1.3.3 · 1.3.4 · 1.3.5 · 1.3.6 · 1.3.7

Fixed in: newer than 1.3.13

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy net6 || rpm -q net6 || net6 --version

2. UPGRADE to newer than 1.3.13 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade net6

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade net6

Note

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

opensuse opensuse MITIGATE

Affected: 11.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.3

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.

opensuse project opensuse MITIGATE

Affected: 11.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.4

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-2011-4093?

solaris: mitigate or apply the listed mitigation; net6: upgrade to newer than 1.3.13; opensuse: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2011-4093 being exploited?

CVE-2011-4093 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-2011-4093 affect?

CVE-2011-4093 affects solaris, net6, opensuse. Severity is medium (CVSS 5.8). Integer overflow in inc/server.hpp in libnet6 (aka net6) before 1.3.14 might allow remote attackers to hijack connections and gain privileges as other users by making a large number of connections until the overflow occurs and an ID of anot

How urgent is CVE-2011-4093?

Priority 40/100. No elevated risk signals yet.

Related CVEs

CVE-2026-34281 MEDIUM 6.5 MITIGATE Vulnerability in the Oracle Solaris product of Oracle Systems (component: Kernel)
CVE-2026-46914 HIGH 7.1 MITIGATE Vulnerability in the Oracle Solaris product of Oracle Systems (component: Filesystem)
CVE-2026-46978 CRITICAL 10.0 MITIGATE Vulnerability in the Oracle Solaris product of Oracle Systems (component: Remote Administration Daemon)
CVE-2026-60834 HIGH 7.1 MITIGATE Vulnerability in the Oracle Solaris product of Oracle Systems (component: Utility)
CVE-2026-60833 HIGH 7.0 MITIGATE Vulnerability in the Oracle Solaris product of Oracle Systems (component: Utility)

References

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