CVE-2020-10756

Name: CVE-2020-10756
Creator: NVD / NIST
Published: 2020-07-09T16:15:13.47+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.51%

Last modified Jun 17, 2026

CVE-2020-10756 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. An out-of-bounds read vulnerability was found in the SLiRP networking implementation of the QEMU emulator. This flaw occurs in the icmp6_send_echoreply() routine while replying to an ICMP echo request, also known as ping. EPSS estimates a 0.51% chance of exploitation in the next 30 days.

Description

An out-of-bounds read vulnerability was found in the SLiRP networking implementation of the QEMU emulator. This flaw occurs in the icmp6_send_echoreply() routine while replying to an ICMP echo request, also known as ping. This flaw allows a malicious guest to leak the contents of the host memory, resulting in possible information disclosure. This flaw affects versions of libslirp before 4.3.1.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.51%

39.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Libslirp Project	Libslirp	< 4.3.1
Redhat	Openstack	13
Redhat	Enterprise Linux	7.0
Redhat	Enterprise Linux	8.0
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	20.04
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0
Opensuse	Leap	15.0
Opensuse	Leap	15.1

References

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00035.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00040.htmlMailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1835986Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00020.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JYTZ32P67PZER6P7TW6FQK3SZRKQLVEI/
https://security.netapp.com/advisory/ntap-20201001-0001/Third Party Advisory
https://usn.ubuntu.com/4437-1/Third Party Advisory
https://usn.ubuntu.com/4467-1/Third Party Advisory
https://www.debian.org/security/2020/dsa-4728Mailing List, Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-1005/Third Party Advisory, VDB Entry
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00035.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00040.htmlMailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1835986Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00020.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JYTZ32P67PZER6P7TW6FQK3SZRKQLVEI/
https://security.netapp.com/advisory/ntap-20201001-0001/Third Party Advisory
https://usn.ubuntu.com/4437-1/Third Party Advisory
https://usn.ubuntu.com/4467-1/Third Party Advisory
https://www.debian.org/security/2020/dsa-4728Mailing List, Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-1005/Third Party Advisory, VDB Entry

Timeline

Published: Jul 9, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-10756?

How severe is CVE-2020-10756?

CVE-2020-10756 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.51% probability of exploitation in the next 30 days.

How do I fix CVE-2020-10756?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-10756?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST