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CVE-2011-4111

22
FAUCET Score

CVE-2011-4111 describes a buffer overflow in QEMU versions before 0.15.2 and 1.x before 1.0-rc4, specifically within the ccid_card_vscard_handle_message function. This vulnerability allows remote attackers to trigger a denial of service and potentially execute arbitrary code through a crafted VSC_ATR message. With a CVSS score of 6.8, it has an adjacent attack vector and high complexity, but could lead to complete compromise of confidentiality, integrity, and availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
6.1.zCPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server_supplementary:6.1.z:*:*:*:*:*:*:*
<= 0.15.1CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
0.15.0CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:0.15.0:*:*:*:*:*:*:*
0.15.0CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:0.15.0:rc1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.8MEDIUM

AV:A/AC:H/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
ADJACENT_NETWORK
Access Complexity
HIGH
Authentication
NONE
Exploitability Score
3.2
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.26%
Probability of exploitation in next 30 days
EPSS Percentile
81.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0226 is in the 99th percentile among its peer group of 1,749 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: qemu-kvm-2:0.12.1.2-2.209.el6_2.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: qemu-kvm-2:0.12.1.2-2.160.el6_1.9
View patch

Vendor Advisories (1)

redhatCVE-2011-4111Important

qemu: ccid: buffer overflow in handling of VSC_ATR message

Nov 28, 2011

References

git.qemu.org
git.qemu.org
rhn.redhat.com / errata/RHSA-2011-1777.html
rhn.redhat.com / errata/RHSA-2011-1801.html
bugzilla.redhat.com / show_bug.cgi