HOMEVULNERABILITIESCVE-2018-10839
MEDIUM

CVE-2018-10839

CWE-121Published: October 16, 2018· Updated: Jun 17, 2026

6.5
CVSS v3.1

Official Description

Qemu emulator <= 3.0.0 built with the NE2000 NIC emulation support is vulnerable to an integer overflow, which could lead to buffer overflow issue. It could occur when receiving packets over the network. A user inside guest could use this flaw to crash the Qemu process resulting in DoS.

NVD Source

Technical Analysis

CVE-2018-10839 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityHigh
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Affected Vendors & Products

Canonical1 product(s)
ubuntu linux
Debian1 product(s)
debian linux
qemu1 product(s)
qemu
Source: NVD CPE · 7 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://usn.ubuntu.com/3826-1/
PATCHhttps://usn.ubuntu.com/3826-1/
ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10839
ADVISORYhttps://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
ADVISORYhttps://lists.gnu.org/archive/html/qemu-devel/2018-09/msg03273.html
ADVISORYhttps://www.debian.org/security/2018/dsa-4338
ADVISORYhttps://www.openwall.com/lists/oss-security/2018/10/08/1
ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10839
ADVISORYhttps://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
ADVISORYhttps://lists.gnu.org/archive/html/qemu-devel/2018-09/msg03273.html
ADVISORYhttps://www.debian.org/security/2018/dsa-4338
ADVISORYhttps://www.openwall.com/lists/oss-security/2018/10/08/1

All References (14)

→
https://access.redhat.com/errata/RHSA-2019:2892
→
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10839Issue Tracking · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.htmlThird Party Advisory
→
https://lists.gnu.org/archive/html/qemu-devel/2018-09/msg03273.htmlExploit · Mailing List · Third Party Advisory
→
https://usn.ubuntu.com/3826-1/Patch · Vendor Advisory
→
https://www.debian.org/security/2018/dsa-4338Vendor Advisory
→
https://www.openwall.com/lists/oss-security/2018/10/08/1Mailing List · Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2019:2892
→
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10839Issue Tracking · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.htmlThird Party Advisory
→
https://lists.gnu.org/archive/html/qemu-devel/2018-09/msg03273.htmlExploit · Mailing List · Third Party Advisory
→
https://usn.ubuntu.com/3826-1/Patch · Vendor Advisory
→
https://www.debian.org/security/2018/dsa-4338Vendor Advisory
→
https://www.openwall.com/lists/oss-security/2018/10/08/1Mailing List · Third Party Advisory

Quick Facts

CVE IDCVE-2018-10839
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-121
CISA KEVNo
Affected3 vendor(s)
PublishedOct 16, 2018

Related CVEs (CWE-121)

CVE-2026-12846
10.0
CVE-2017-20230
10.0
CVE-2014-0787
10.0
CVE-2026-12848
10.0
CVE-2026-37541
10.0
CVE-2026-12485
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-10839 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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