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CVE-2015-8104

25
FAUCET Score

CVE-2015-8104 is a critical denial-of-service vulnerability affecting the KVM subsystem in the Linux kernel (through 4.2.6) and Xen (4.3.x through 4.6.x). A guest OS user can trigger a host OS panic or hang by generating numerous Debug exceptions. This vulnerability has a CVSS score of 10.0, indicating a critical severity with network accessibility, low attack complexity, and high impact on confidentiality, integrity, and availability. Despite its 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
4.3.0CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.3.0:*:*:*:*:*:*:*
4.3.1CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.3.1:*:*:*:*:*:*:*
4.3.2CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.3.2:*:*:*:*:*:*:*
4.3.3CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.3.3:*:*:*:*:*:*:*
4.3.4CPE matchmatch criteria
cpe:2.3:o:xen:xen:4.3.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.7MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
3.4
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.50%
Probability of exploitation in next 30 days
EPSS Percentile
83.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0250 is in the 73rd percentile among its peer group of 36,897 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (12)

github_advisorypatch availablevia nvd_reference
View patch
oraclepatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.2 Advanced Update SupportFixed in: kernel-0:2.6.32-220.65.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.4 Advanced Update SupportFixed in: kernel-0:2.6.32-358.69.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.5 Advanced Update SupportFixed in: kernel-0:2.6.32-431.68.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel-0:2.6.32-573.12.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.6 Extended Update SupportFixed in: kernel-0:2.6.32-504.40.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-327.3.1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7.1 Extended Update SupportFixed in: kernel-0:3.10.0-229.26.2.el7
View patch
redhatvendor investigatingvia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xen
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kvm

Vendor Advisories (1)

redhatCVE-2015-8104Important

virt: guest to host DoS by triggering an infinite loop in microcode via #DB exception

Nov 10, 2015

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
Issue TrackingPatchVendor Advisory
lists.fedoraproject.org / pipermail/package-announce/2015-November/172187.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2015-November/172300.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2015-November/172435.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2015-11/msg00035.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2015-12/msg00005.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2015-12/msg00026.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2015-12/msg00031.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-02/msg00013.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-04/msg00015.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-08/msg00038.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-updates/2015-12/msg00039.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-updates/2015-12/msg00053.html
Mailing ListThird Party Advisory
rhn.redhat.com / errata/RHSA-2015-2636.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2015-2645.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2016-0046.html
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingVendor Advisory
github.com / torvalds/linux/commit/cbdb967af3d54993f5814f1cee0ed311a055377d
Issue TrackingPatchVendor Advisory
kb.juniper.net / JSA10783
Third Party Advisory
support.citrix.com / article/CTX202583
Third Party Advisory
support.citrix.com / article/CTX203879
Third Party Advisory
debian.org / security/2015/dsa-3414
Third Party Advisory
debian.org / security/2015/dsa-3426
Third Party Advisory
debian.org / security/2016/dsa-3454
Third Party Advisory
openwall.com / lists/oss-security/2015/11/10/5
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2023/10/10/4
oracle.com / technetwork/security-advisory/cpujul2016-2881720.html
PatchThird Party Advisory
oracle.com / technetwork/topics/security/cpujan2016-2367955.html
PatchThird Party Advisory
oracle.com / technetwork/topics/security/linuxbulletinjan2016-2867209.html
Third Party Advisory
oracle.com / technetwork/topics/security/linuxbulletinoct2015-2719645.html
Third Party Advisory
oracle.com / technetwork/topics/security/ovmbulletinjul2016-3090546.html
Third Party Advisory
securityfocus.com / bid/77524
Third Party AdvisoryVDB Entry
securityfocus.com / bid/91787
Third Party AdvisoryVDB Entry
securitytracker.com / id/1034105
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-2840-1
Third Party Advisory
ubuntu.com / usn/USN-2841-1
Third Party Advisory
ubuntu.com / usn/USN-2841-2
Third Party Advisory
ubuntu.com / usn/USN-2842-1
Third Party Advisory
ubuntu.com / usn/USN-2842-2
Third Party Advisory
ubuntu.com / usn/USN-2843-1
Third Party Advisory
ubuntu.com / usn/USN-2843-2
Third Party Advisory
ubuntu.com / usn/USN-2844-1
Third Party Advisory
xenbits.xen.org / xsa/advisory-156.html
PatchVendor Advisory