CVE-2015-5239

21

FAUCET Score

CVE-2015-5239 describes an integer overflow vulnerability in the VNC display driver of QEMU versions prior to 2.1.0, affecting products from vendors like Arista, Canonical, Fedora, QEMU, and SUSE. This medium-severity flaw (CVSS 6.5) can be triggered remotely by an authenticated attacker sending a CLIENT_CUT_TEXT message, leading to a denial of service through a process crash due to an infinite loop. There is no evidence of active exploitation, public exploit code, or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 2.1.0CPE matchmatch criteria	cpe:2.3:a:qemu:qemu::::::::
		21CPE matchmatch criteria	cpe:2.3:o:fedoraproject:fedora:21:::::::*
		22CPE matchmatch criteria	cpe:2.3:o:fedoraproject:fedora:22:::::::*
		23CPE matchmatch criteria	cpe:2.3:o:fedoraproject:fedora:23:::::::*
		12.04CPE matchmatch criteria	cpe:2.3:o:canonical:ubuntu_linux:12.04::::lts:::

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

Exploitability Score

2.8

Impact Score

3.6

CvssVersion

3.1

Exploit Intelligence

EPSS Score

3.61%

Probability of exploitation in next 30 days

EPSS Percentile

88.3%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0361 is in the 96th percentile among its peer group of 21,974 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (9)

github_advisorypatch availablevia nvd_reference

ubuntupatch availablevia nvd_reference

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Linux 5Fixed in: kvm

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Linux 6Fixed in: qemu-kvm

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Linux 7Fixed in: qemu-kvm

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse)Fixed in: qemu-kvm-rhev

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Virtualization 3Fixed in: qemu-kvm-rhev

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Virtualization 3Fixed in: rhev-hypervisor

redhatend of lifevia redhat_api

Product: Red Hat Ceph Storage 1.1Fixed in: qemu-kvm

Vendor Advisories (1)

redhatCVE-2015-5239Moderate

qemu-kvm: Integer overflow in vnc_client_read() and protocol_client_msg()

References

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

Mailing ListThird Party Advisory

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

Mailing ListThird Party Advisory

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

Mailing ListThird Party Advisory

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

Mailing ListThird Party Advisory

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

Mailing ListThird Party Advisory

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

Mailing ListThird Party Advisory

github.com / qemu/qemu/commit/f9a70e79391f6d7c2a912d785239ee8effc1922d

PatchThird Party Advisory

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

Third Party Advisory

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

Mailing ListPatchThird Party Advisory

ubuntu.com / usn/USN-2745-1

PatchThird Party Advisory