HOME VULNERABILITIESCVE-2015-5239

MEDIUM

CVE-2015-5239

CWE-835Published: January 23, 2020· Updated: Jun 17, 2026

6.5

CVSS v3.1

Official Description

Integer overflow in the VNC display driver in QEMU before 2.1.0 allows attachers to cause a denial of service (process crash) via a CLIENT_CUT_TEXT message, which triggers an infinite loop.

Technical Analysis

CVE-2015-5239 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

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 ComplexityLow

Privileges Req.Low

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

arista1 product(s)

eos

Canonical1 product(s)

ubuntu linux

Fedora1 product(s)

fedora

qemu1 product(s)

qemu

SUSE4 product(s)

linux enterprise debuginfolinux enterprise desktoplinux enterprise serverlinux enterprise software development kit

Source: NVD CPE · 18 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://www.openwall.com/lists/oss-security/2015/09/02/7

PATCHhttp://www.ubuntu.com/usn/USN-2745-1

PATCHhttps://github.com/qemu/qemu/commit/f9a70e79391f6d7c2a912d785239ee8effc1922d

PATCHhttp://www.openwall.com/lists/oss-security/2015/09/02/7

PATCHhttp://www.ubuntu.com/usn/USN-2745-1

PATCHhttps://github.com/qemu/qemu/commit/f9a70e79391f6d7c2a912d785239ee8effc1922d

ADVISORYhttp://lists.fedoraproject.org/pipermail/package-announce/2015-October/168077.html

ADVISORYhttp://lists.fedoraproject.org/pipermail/package-announce/2015-October/168646.html

ADVISORYhttp://lists.fedoraproject.org/pipermail/package-announce/2015-October/168671.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2015-10/msg00026.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2015-11/msg00005.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2015-11/msg00011.html

ADVISORYhttps://www.arista.com/en/support/advisories-notices/security-advisories/1188-security-advisory-14

ADVISORYhttp://lists.fedoraproject.org/pipermail/package-announce/2015-October/168077.html

ADVISORYhttp://lists.fedoraproject.org/pipermail/package-announce/2015-October/168646.html

ADVISORYhttp://lists.fedoraproject.org/pipermail/package-announce/2015-October/168671.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2015-10/msg00026.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2015-11/msg00005.html

ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2015-11/msg00011.html

ADVISORYhttps://www.arista.com/en/support/advisories-notices/security-advisories/1188-security-advisory-14

All References (20)

→

http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168077.htmlMailing List · Third Party Advisory

→

http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168646.htmlMailing List · Third Party Advisory

→

http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168671.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00026.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00005.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00011.htmlMailing List · Third Party Advisory

→

http://www.openwall.com/lists/oss-security/2015/09/02/7Mailing List · Patch · Third Party Advisory

→

http://www.ubuntu.com/usn/USN-2745-1Patch · Third Party Advisory

→

https://github.com/qemu/qemu/commit/f9a70e79391f6d7c2a912d785239ee8effc1922dPatch · Third Party Advisory

→

https://www.arista.com/en/support/advisories-notices/security-advisories/1188-security-advisory-14Third Party Advisory

→

http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168077.htmlMailing List · Third Party Advisory

→

http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168646.htmlMailing List · Third Party Advisory

→

http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168671.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00026.htmlMailing List · Third Party Advisory

→

http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00005.htmlMailing List · Third Party Advisory

Quick Facts

CVE IDCVE-2015-5239

CVSS Score6.5 / 10

SeverityMEDIUM

WeaknessCWE-835

CISA KEVNo

Affected5 vendor(s)

PublishedJan 23, 2020

Related CVEs (CWE-835)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2015-5239 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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