CVE-2015-6815

The process_tx_desc function in hw/net/e1000.c in QEMU before 2.4.0.1 does not properly process transmit descriptor data when sending a network packet, which allows attackers to cause a denial of service (infinite loop and guest crash) via unspecified vectors.

Published: 2020-01-31 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-6815 is rated Low Risk (33.5/100): CVSS Low severity, with medium exploitation likelihood (EPSS 0.98%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2015-6815

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.57% 0.98% -0.59%
2 2026-03-19 2.25% 1.57% -0.67%
3 2025-12-28 — 2.25% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-6815

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.5 3.1 LOW
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.1 1.4 [email protected]
2.7 2.0 LOW
AV:A/AC:L/Au:S/C:N/I:N/A:P Click to expand
Access vector (AV:A)
Requires access to an adjacent network segment.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 5.1 2.9 [email protected]

Weakness enumeration for CVE-2015-6815

OS Trackers for CVE-2015-6815

vendor priority summary link
debian not yet assigned CVE-2015-6815 not yet assigned priority: Debian including 1 source packages (qemu), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2015-6815
gentoo normal CVE-2015-6815: 1 GLSA(s) (201602-01), 1 atom(s) (app-emulation/qemu); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2015-6815
redhat low — https://access.redhat.com/security/cve/CVE-2015-6815
suse low CVE-2015-6815 severity low: SUSE including 907 source package names (amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, amazon/suse-sles-15-sp1-chost-byos-v20220127-hvm-ssd-x86_64, …), 1238 product×package rows across 76 product lines (HPE Helion OpenStack 8, SUSE Linux Enterprise Desktop 11 SP3, … (76 product lines)): Fixed 955, Known Affected 157, Known Not Affected 126. https://www.suse.com/security/cve/CVE-2015-6815/
ubuntu low CVE-2015-6815 low priority: Ubuntu including 2 source packages (qemu, qemu-kvm), 8 status rows across 4 suites (precise, trusty, upstream, vivid): DNE 3, released 3, needs-triage 2. https://ubuntu.com/security/CVE-2015-6815

Affected software / configurations for CVE-2015-6815

Vendor Product Version Raw CPE
qemu qemu < 2.4.0.1 cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
fedoraproject fedora 21 cpe:2.3:o:fedoraproject:fedora:21:*:*:*:*:*:*:*
fedoraproject fedora 22 cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*
fedoraproject fedora 23 cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*
novell suse_linux_enterprise_software_development_kit 11.0 cpe:2.3:a:novell:suse_linux_enterprise_software_development_kit:11.0:sp3:*:*:*:*:*:*
novell suse_linux_enterprise_software_development_kit 11.0 cpe:2.3:a:novell:suse_linux_enterprise_software_development_kit:11.0:sp4:*:*:*:*:*:*
novell suse_linux_enterprise_software_development_kit 12.0 cpe:2.3:a:novell:suse_linux_enterprise_software_development_kit:12.0:*:*:*:*:*:*:*
novell suse_linux_enterprise_debuginfo 11.0 cpe:2.3:o:novell:suse_linux_enterprise_debuginfo:11.0:sp3:*:*:*:*:*:*
novell suse_linux_enterprise_debuginfo 11.0 cpe:2.3:o:novell:suse_linux_enterprise_debuginfo:11.0:sp4:*:*:*:*:*:*
novell suse_linux_enterprise_desktop 11.0 cpe:2.3:o:novell:suse_linux_enterprise_desktop:11.0:sp3:*:*:*:*:*:*
novell suse_linux_enterprise_desktop 11.0 cpe:2.3:o:novell:suse_linux_enterprise_desktop:11.0:sp4:*:*:*:*:*:*
novell suse_linux_enterprise_desktop 12.0 cpe:2.3:o:novell:suse_linux_enterprise_desktop:12.0:*:*:*:*:*:*:*
novell suse_linux_enterprise_server 11.0 cpe:2.3:o:novell:suse_linux_enterprise_server:11.0:sp3:*:*:*:*:*:*
novell suse_linux_enterprise_server 11.0 cpe:2.3:o:novell:suse_linux_enterprise_server:11.0:sp4:*:*:*:*:*:*
novell suse_linux_enterprise_server 12.0 cpe:2.3:o:novell:suse_linux_enterprise_server:12.0:*:*:*:*:*:*:*
canonical ubuntu_linux 12.04 cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 15.04 cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:*
redhat openstack 5.0 cpe:2.3:a:redhat:openstack:5.0:*:*:*:*:*:*:*
redhat openstack 6.0 cpe:2.3:a:redhat:openstack:6.0:*:*:*:*:*:*:*
redhat openstack 7.0 cpe:2.3:a:redhat:openstack:7.0:*:*:*:*:*:*:*
redhat enterprise_linux 5.0 cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:*
redhat enterprise_linux 6.0 cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
redhat enterprise_linux 7.0 cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
xen xen 4.4.3 cpe:2.3:o:xen:xen:4.4.3:*:*:*:*:*:*:*
xen xen 4.5.1 cpe:2.3:o:xen:xen:4.5.1:*:*:*:*:*:*:*
arista eos 4.12 cpe:2.3:o:arista:eos:4.12:*:*:*:*:*:*:*
arista eos 4.13 cpe:2.3:o:arista:eos:4.13:*:*:*:*:*:*:*
arista eos 4.14 cpe:2.3:o:arista:eos:4.14:*:*:*:*:*:*:*
arista eos 4.15 cpe:2.3:o:arista:eos:4.15:*:*:*:*:*:*:*

References for CVE-2015-6815

URL Tags
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168077.html Mailing List Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168646.html Mailing List Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-October/168671.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00026.html Mailing List Patch Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00005.html Mailing List Patch Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00011.html Mailing List Patch Third Party Advisory
http://www.openwall.com/lists/oss-security/2015/09/04/4 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2015/09/05/5 Mailing List Third Party Advisory
http://www.ubuntu.com/usn/USN-2745-1 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1260076 Issue Tracking Patch Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2015-09/msg01199.html Mailing List Patch Third Party Advisory
https://lists.gnu.org/archive/html/qemu-devel/2015-09/msg05832.html Mailing List Patch Third Party Advisory
https://www.arista.com/en/support/advisories-notices/security-advisories/1188-security-advisory-14 Third Party Advisory
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