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CVE-2012-2119

18
FAUCET Score

CVE-2012-2119 describes a buffer overflow vulnerability in the macvtap device driver within the Linux kernel versions prior to 3.4.5. This flaw allows privileged KVM guest users to trigger a denial of service (system crash) by providing a malformed descriptor with an extended vector length. With a CVSS score of 5.2, this vulnerability requires adjacent network access and medium attack complexity, resulting in a complete loss of availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.4.4CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
3.4CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:3.4:*:*:*:*:*:*:*
3.4.1CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*
3.4.2CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*
3.4.3CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:3.4.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.2MEDIUM

AV:A/AC:M/Au:S/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
ADJACENT_NETWORK
Access Complexity
MEDIUM
Authentication
SINGLE
Exploitability Score
4.4
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.71%
Probability of exploitation in next 30 days
EPSS Percentile
49.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0071 is in the 75th percentile among its peer group of 74 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 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 (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel-0:2.6.32-220.23.1.el6
View patch

Vendor Advisories (1)

redhatCVE-2012-2119Important

kernel: macvtap: zerocopy: vector length is not validated before pinning user pages

Apr 16, 2012

References

bugzilla.redhat.com / bugzilla/show_bug.cgi
git.kernel.org
lists.opensuse.org / opensuse-security-announce/2013-06/msg00005.html
marc.info
rhn.redhat.com / errata/RHSA-2012-0743.html
github.com / torvalds/linux/commit/b92946e2919134ebe2a4083e4302236295ea2a73
oss.oracle.com / git
ubuntu.com / usn/usn-1529-1
kernel.org / pub/linux/kernel/v3.x/ChangeLog-3.4.5
openwall.com / lists/oss-security/2012/04/19/14