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Vulnerability record · CVE-2020-10756 · published 9 July 2020

CVE-2020-10756: Libslirp project libslirp out-of-bounds read vulnerability

LLibslirp Project · Libslirp

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.

6.5 CVSS 3.1 Medium EPSS 0.51% · top 58.9% CWE-125 · Out-of-bounds read
6.5CVSS 3.1 base score, v2 2.1
0.51%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
20References
17 Jun 2026Last modified by NVD

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.

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

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00035.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00040.html Mailing ListThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1835986 Issue TrackingPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00020.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JYTZ32P67PZER6P7TW6FQK3
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-4728 Mailing ListThird Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-1005/ Third Party AdvisoryVDB Entry
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00035.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00040.html Mailing ListThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1835986 Issue TrackingPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00020.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JYTZ32P67PZER6P7TW6FQK3
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-4728 Mailing ListThird Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-1005/ Third Party AdvisoryVDB Entry

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Source: NIST National Vulnerability Database (record CVE-2020-10756), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.