CVE-2020-1983
libslirp: use after free vulnerability cause a denial of service.
02 Description
libslirp: use after free vulnerability cause a denial of service.
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 2.35% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 83.6% of scored records. A rank, not a probability.
- NVD base score
- 6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2020-04-22 19:30Z6 YR AGO
- Last updated
- 2024-09-16 19:41Z2 YR AGO
- Reserved
- 2019-12-04
- Assigning CNA
- palo_alto
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.5)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-416Use After FreeVariant
- Data version
- 5.1
- Document digest
- c0b962ab4e0ebe60ea0390c5efc197e0d158ba3bbfa6942a36ba71abc531e7e9
05 Affected products
06 References
- gitlab.freedesktop.orghttps://gitlab.freedesktop.org/slirp/libslirp/-/issues/20
- gitlab.freedesktop.orghttps://gitlab.freedesktop.org/slirp/libslirp/-/commit/9ac0371bb8c0a40f5d9f82a1c25129660e81df04
- www.debian.orgDSA-4665https://www.debian.org/security/2020/dsa-4665
- lists.fedoraproject.orgFEDORA-2020-30c45be10chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HWFD4MWV3YWIHVHSA2F7FKOLJFL4PHOX/
- lists.fedoraproject.orgFEDORA-2020-1608d52724https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NKT2MTSINE4NUPG5L6BYH6N23NBNITOL/
- lists.opensuse.orgopenSUSE-SU-2020:0636http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00022.html
- usn.ubuntu.comUSN-4372-1https://usn.ubuntu.com/4372-1/
- lists.opensuse.orgopenSUSE-SU-2020:0756http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00001.html
- lists.debian.org[debian-lts-announce] 20200629 [SECURITY] [DLA 2262-1] qemu security updatehttps://lists.debian.org/debian-lts-announce/2020/06/msg00032.html
- lists.debian.org[debian-lts-announce] 20200726 [SECURITY] [DLA 2288-1] qemu security updatehttps://lists.debian.org/debian-lts-announce/2020/07/msg00020.html
07 Fixed in
AlmaLinux 8
- hivex Fixed in 1.3.18-20.module_el8.3.0+2048+e7a0a3ea
- hivex-devel Fixed in 1.3.18-20.module_el8.3.0+2048+e7a0a3ea
- libguestfs-winsupport Fixed
A version is affected if any line below covers it.
- Affected before 8.2-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 8.2-1.module_el8.5.0+2608+72063365
- libiscsi Fixed
A version is affected if any line below covers it.
- Affected before 1.18.0-8.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.18.0-8.module_el8.5.0+2608+72063365
- Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
- libiscsi-devel Fixed
A version is affected if any line below covers it.
- Affected before 1.18.0-8.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.18.0-8.module_el8.5.0+2608+72063365
- Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
- libiscsi-utils Fixed
A version is affected if any line below covers it.
- Affected before 1.18.0-8.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.18.0-8.module_el8.5.0+2608+72063365
- Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
- libnbd Fixed
A version is affected if any line below covers it.
- Affected before 1.2.2-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.2.2-1.module_el8.5.0+2608+72063365
- libnbd-devel Fixed
A version is affected if any line below covers it.
- Affected before 1.2.2-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.2.2-1.module_el8.5.0+2608+72063365
- libvirt Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-admin Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-bash-completion Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-client Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-config-network Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-config-nwfilter Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-interface Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-network Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-nodedev Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-nwfilter Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-secret Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-storage Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-storage-core Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-storage-disk Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-storage-iscsi Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-storage-iscsi-direct Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-storage-logical Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-storage-mpath Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-storage-rbd Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-storage-scsi Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-dbus Fixed
A version is affected if any line below covers it.
- Affected before 1.3.0-2.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.3.0-2.module_el8.5.0+2608+72063365
- Affected before 1.3.0-2.module_el8.6.0+2880+7d9e3703
- libvirt-devel Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-docs Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-libs Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-nss Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- nbdfuse Fixed
A version is affected if any line below covers it.
- Affected before 1.2.2-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.2.2-1.module_el8.5.0+2608+72063365
- nbdkit Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-bash-completion Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-basic-filters Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-basic-plugins Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-curl-plugin Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
35 further packages in AlmaLinux 8 not shown (first 40 listed).
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- hivex Fixed in 1.3.18-20.module_el8.3.0+2048+e7a0a3ea
- hivex-devel Fixed in 1.3.18-20.module_el8.3.0+2048+e7a0a3ea
- libguestfs-winsupport Fixed
A version is affected if any line below covers it.
- Affected before 8.2-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 8.2-1.module_el8.5.0+2608+72063365
- libiscsi Fixed
A version is affected if any line below covers it.
- Affected before 1.18.0-8.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.18.0-8.module_el8.5.0+2608+72063365
- Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
- libiscsi-devel Fixed
A version is affected if any line below covers it.
- Affected before 1.18.0-8.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.18.0-8.module_el8.5.0+2608+72063365
- Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
- libiscsi-utils Fixed
A version is affected if any line below covers it.
- Affected before 1.18.0-8.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.18.0-8.module_el8.5.0+2608+72063365
- Affected before 1.18.0-8.module_el8.6.0+2880+7d9e3703
- libnbd Fixed
A version is affected if any line below covers it.
- Affected before 1.2.2-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.2.2-1.module_el8.5.0+2608+72063365
- libnbd-devel Fixed
A version is affected if any line below covers it.
- Affected before 1.2.2-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.2.2-1.module_el8.5.0+2608+72063365
- libvirt Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-admin Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-bash-completion Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-client Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-config-network Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-config-nwfilter Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-interface Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-network Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-nodedev Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-nwfilter Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-secret Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-storage Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-storage-core Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-storage-disk Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-storage-iscsi Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-storage-iscsi-direct Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-storage-logical Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-storage-mpath Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-storage-rbd Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-daemon-driver-storage-scsi Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-dbus Fixed
A version is affected if any line below covers it.
- Affected before 1.3.0-2.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.3.0-2.module_el8.5.0+2608+72063365
- Affected before 1.3.0-2.module_el8.6.0+2880+7d9e3703
- libvirt-devel Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-docs Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-libs Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- libvirt-nss Fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3ea
- nbdfuse Fixed
A version is affected if any line below covers it.
- Affected before 1.2.2-1.module_el8.3.0+2048+e7a0a3ea
- Affected before 1.2.2-1.module_el8.5.0+2608+72063365
- nbdkit Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-bash-completion Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-basic-filters Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-basic-plugins Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
- nbdkit-curl-plugin Fixed in 1.16.2-4.module_el8.5.0+2608+72063365
35 further packages in CloudLinux 8 not shown (first 40 listed).
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- libslirp Fixed in 4.2.0-2
- qemu Fixed in 1:4.1-2
- slirp4netns Fixed in 1.0.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- libslirp Fixed in 4.2.0-2
- qemu Fixed in 1:4.1-2
- slirp4netns Fixed in 1.0.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- libslirp Fixed in 4.2.0-2
- qemu Fixed in 1:4.1-2
- slirp4netns Fixed in 1.0.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- qemu Fixed in 1:2.5+dfsg-5ubuntu10.44
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- qemu Fixed in 1:2.11+dfsg-1ubuntu7.26
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- libslirp Fixed in 4.1.0-2ubuntu2
- slirp4netns No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- qemu Fixed in 2.0.0+dfsg-2ubuntu1.47+esm4Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.