HOMEVULNERABILITIESCVE-2020-10761
MEDIUM

CVE-2020-10761

CWE-617Published: June 9, 2020· Updated: Jun 17, 2026

5.0
CVSS v3.1

Official Description

An assertion failure issue was found in the Network Block Device(NBD) Server in all QEMU versions before QEMU 5.0.1. This flaw occurs when an nbd-client sends a spec-compliant request that is near the boundary of maximum permitted request length. A remote nbd-client could use this flaw to crash the qemu-nbd server resulting in a denial of service.

NVD Source

Technical Analysis

CVE-2020-10761 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeChanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L

Affected Vendors & Products

Canonical1 product(s)
ubuntu linux
openSUSE1 product(s)
leap
qemu1 product(s)
qemu
Red Hat1 product(s)
enterprise linux
Source: NVD CPE · 6 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://www.openwall.com/lists/oss-security/2020/06/09/1
PATCHhttps://www.openwall.com/lists/oss-security/2020/06/09/1
ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00086.html
ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10761
ADVISORYhttps://security.gentoo.org/glsa/202011-09
ADVISORYhttps://security.netapp.com/advisory/ntap-20200731-0001/
ADVISORYhttps://usn.ubuntu.com/4467-1/
ADVISORYhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00086.html
ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10761
ADVISORYhttps://security.gentoo.org/glsa/202011-09
ADVISORYhttps://security.netapp.com/advisory/ntap-20200731-0001/
ADVISORYhttps://usn.ubuntu.com/4467-1/

All References (12)

→
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00086.htmlMailing List · Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10761Issue Tracking · Third Party Advisory
→
https://security.gentoo.org/glsa/202011-09Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20200731-0001/Third Party Advisory
→
https://usn.ubuntu.com/4467-1/Third Party Advisory
→
https://www.openwall.com/lists/oss-security/2020/06/09/1Mailing List · Patch · Third Party Advisory
→
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00086.htmlMailing List · Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10761Issue Tracking · Third Party Advisory
→
https://security.gentoo.org/glsa/202011-09Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20200731-0001/Third Party Advisory
→
https://usn.ubuntu.com/4467-1/Third Party Advisory
→
https://www.openwall.com/lists/oss-security/2020/06/09/1Mailing List · Patch · Third Party Advisory

Quick Facts

CVE IDCVE-2020-10761
CVSS Score5.0 / 10
SeverityMEDIUM
WeaknessCWE-617
CISA KEVNo
Affected4 vendor(s)
PublishedJun 9, 2020

Related CVEs (CWE-617)

CVE-2019-9795
9.8
CVE-2020-3615
9.8
CVE-2020-12417
8.8
CVE-2020-6623
8.8
CVE-2020-6619
8.8
CVE-2020-6617
8.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-10761 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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