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CVE-2015-1779

24
FAUCET Score

CVE-2015-1779 describes a denial-of-service vulnerability in the VNC websocket frame decoder within QEMU, affecting various Linux distributions including Canonical, Debian, Fedora, Oracle, and Red Hat. This high-severity vulnerability (CVSS 8.6) allows unauthenticated remote attackers to exhaust memory and CPU resources by sending large websocket payloads or HTTP headers. Despite its high severity, there is no known active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.2.1CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*
2.3.0CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:2.3.0:rc0:*:*:*:*:*:*
2.3.0CPE matchmatch criteria
cpe:2.3:a:qemu:qemu:2.3.0:rc1:*:*:*:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.6HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
7.39%
Probability of exploitation in next 30 days
EPSS Percentile
93.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0739 is in the 90th percentile among its peer group of 51,553 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, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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 (4)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: qemu-kvm-10:1.5.3-86.el7_1.8
View patch
redhatpatch availablevia redhat_api
Product: RHEV 3.X Hypervisor and Agents for RHEL-7Fixed in: qemu-kvm-rhev-10:2.1.2-23.el7_1.10
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 7Fixed in: qemu-kvm-rhev
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux OpenStack Platform 6 (Juno)Fixed in: qemu-kvm-rhev

Vendor Advisories (1)

redhatCVE-2015-1779Moderate

qemu: vnc: insufficient resource limiting in VNC websockets decoder

Mar 23, 2015

References

lists.fedoraproject.org / pipermail/package-announce/2015-April/154656.html
Third Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2015-April/155196.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2015-05/msg00033.html
Broken Link
lists.opensuse.org / opensuse-security-announce/2015-05/msg00042.html
Broken Link
rhn.redhat.com / errata/RHSA-2015-1931.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2015-1943.html
Third Party Advisory
lists.gnu.org / archive/html/qemu-devel/2015-03/msg04894.html
Mailing ListThird Party Advisory
lists.gnu.org / archive/html/qemu-devel/2015-03/msg04895.html
Mailing ListPatchThird Party Advisory
lists.gnu.org / archive/html/qemu-devel/2015-03/msg04896.html
Mailing ListPatchThird Party Advisory
security.gentoo.org / glsa/201602-01
Third Party Advisory
debian.org / security/2015/dsa-3259
Third Party Advisory
openwall.com / lists/oss-security/2015/03/24/9
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2015/04/09/6
Mailing ListThird Party Advisory
oracle.com / technetwork/topics/security/linuxbulletinoct2015-2719645.html
Third Party Advisory
securityfocus.com / bid/73303
Third Party AdvisoryVDB Entry
securitytracker.com / id/1033975
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-2608-1
Third Party Advisory