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CVE-2015-7311

13
FAUCET Score

CVE-2015-7311 describes a vulnerability in libxl within Xen versions 4.1.x through 4.6.x, where the readonly flag for disk images is not correctly enforced when utilizing the qemu-xen device model. This flaw allows local guest users to bypass the intended read-only restriction and write to disk images that should be immutable. With a CVSS score of 3.6 (AV:L/AC:L/Au:N/C:N/I:P/A:P), this vulnerability has low severity, requiring local access and low attack complexity, with potential impact limited to partial 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 CVE.

Impacted Technologies

VendorProductVersion(s)CPE
4.1.0CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.1.0:*:*:*:*:*:*:*
4.1.1CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.1.1:*:*:*:*:*:*:*
4.1.2CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.1.2:*:*:*:*:*:*:*
4.1.3CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.1.3:*:*:*:*:*:*:*
4.1.4CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.1.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

3.6LOW

AV:L/AC:L/Au:N/C:N/I:P/A:P

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
4.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.42%
Probability of exploitation in next 30 days
EPSS Percentile
34.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0042 is in the 61st percentile among its peer group of 2,096 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.6 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

Vendor Advisories (1)

redhatCVE-2015-7311Low

xen: libxl fails to honour readonly flag on disks with qemu-xen (xsa-142)

Sep 22, 2015

References

lists.fedoraproject.org / pipermail/package-announce/2015-September/167077.html
lists.fedoraproject.org / pipermail/package-announce/2015-September/167792.html
lists.fedoraproject.org / pipermail/package-announce/2015-September/167820.html
lists.opensuse.org / opensuse-updates/2015-12/msg00053.html
bugzilla.redhat.com / show_bug.cgi
security.gentoo.org / glsa/201604-03
debian.org / security/2015/dsa-3414
securityfocus.com / bid/76823
securitytracker.com / id/1033633
xenbits.xen.org / xsa/advisory-142.html
Vendor Advisory