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CVE-2015-7512

25
FAUCET Score

CVE-2015-7512 describes a critical buffer overflow vulnerability in the pcnet_receive function within QEMU, specifically affecting the pcnet NIC emulation. This flaw allows remote attackers to trigger a guest OS crash (denial of service) or execute arbitrary code by sending a large packet to a guest with a larger MTU. With a CVSS score of 9.0 (CRITICAL), it presents a severe risk due to its network-based attack vector and high impact on confidentiality, integrity, and availability. Despite its high severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.4.1CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
2.5.0CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:2.5.0:rc0:*:*:*:*:*:*
2.5.0CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:2.5.0:rc1:*:*:*:*:*:*
2.5.0CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:2.5.0:rc2:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.0CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
7.73%
Probability of exploitation in next 30 days
EPSS Percentile
94.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0773 is in the 89th percentile among its peer group of 201 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.4 Reddit, 1.3 Bluesky, 0.9 Mastodon, and 2.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.8 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: qemu-kvm-2:0.12.1.2-2.479.el6_7.3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 6Fixed in: qemu-kvm-rhev-2:0.12.1.2-2.479.el6_7.3
View patch
redhatpatch availablevia redhat_api
Product: RHEV 3.X Hypervisor and Agents for RHEL-6Fixed in: qemu-kvm-rhev-2:0.12.1.2-2.479.el6_7.3
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kvm
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xen

Vendor Advisories (1)

redhatCVE-2015-7512Important

Qemu: net: pcnet: buffer overflow in non-loopback mode

Nov 30, 2015

References

git.qemu.org
rhn.redhat.com / errata/RHSA-2015-2694.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2015-2695.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2015-2696.html
Third Party Advisory
security.gentoo.org / glsa/201602-01
Third Party Advisory
debian.org / security/2016/dsa-3469
Third Party Advisory
debian.org / security/2016/dsa-3470
Third Party Advisory
debian.org / security/2016/dsa-3471
Third Party Advisory
openwall.com / lists/oss-security/2015/11/30/3
Mailing ListThird Party Advisory
oracle.com / technetwork/topics/security/linuxbulletinjan2016-2867209.html
Third Party Advisory
securityfocus.com / bid/78230
Third Party AdvisoryVDB Entry
securitytracker.com / id/1034527
Third Party AdvisoryVDB Entry