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01 Record

CVE-2020-8608

In libslirp 4.1.0, as used in QEMU 4.2.0, tcp_subr.c misuses snprintf return values, leading to a buffer overflow in later code.

UnratedPUBLISHEDCNA: mitre
CNA base scoreUnratedNo CNA CVSS vector
View raw JSON

02 Description

In libslirp 4.1.0, as used in QEMU 4.2.0, tcp_subr.c misuses snprintf return values, leading to a buffer overflow in later code.

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
2.48% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 84.2% of scored records. A rank, not a probability.
NVD base score
5.6 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Important. 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
2020-02-06 16:45Z6 YR AGO
Last updated
2024-08-04 10:03Z2 YR AGO
Reserved
2020-02-04
Assigning CNA
mitre
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
  • CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base
  • CWE-122Heap-based Buffer OverflowVariant
Data version
5.1
Document digest
d0df0abb9406575ca4380db529bddeeab4f0e8618e049f0fa2d1f04be92bada4

05 Affected products

VendorProductVersionsPlatforms
debiandebian_linuxNot specified—
libslirp_projectlibslirpNot specified—
opensuseleapNot specified—
redhatadvanced_virtualizationNot specified—
redhatenterprise_linuxNot specified—
redhatopenshiftNot specified—
redhatopenstackNot specified—
redhatrhel_e4sNot specified—
redhatrhel_eusNot specified—
redhatrhel_extras_otherNot specified—
redhatrhev_managerNot specified—

06 References

07 Fixed in

AlmaLinux 8

  • cockpit-podman
    Fixed

    A version is affected if any line below covers it.

    • Affected before 11-1.module_el8.5.0+108+00865455
    • Affected before 11-1.module_el8.5.0+2635+e4386a39
  • containernetworking-plugins
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.8.3-4.module_el8.5.0+108+00865455
    • Affected before 0.8.3-4.module_el8.5.0+2635+e4386a39
  • 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
  • netcf
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.2.8-12.module_el8.3.0+2048+e7a0a3ea
    • Affected before 0.2.8-12.module_el8.5.0+2608+72063365
    • Affected before 0.2.8-12.module_el8.6.0+2880+7d9e3703
  • netcf-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.2.8-12.module_el8.3.0+2048+e7a0a3ea
    • Affected before 0.2.8-12.module_el8.5.0+2608+72063365
    • Affected before 0.2.8-12.module_el8.6.0+2880+7d9e3703
  • netcf-libs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.2.8-12.module_el8.3.0+2048+e7a0a3ea
    • Affected before 0.2.8-12.module_el8.5.0+2608+72063365
    • Affected before 0.2.8-12.module_el8.6.0+2880+7d9e3703
  • python-podman-api
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1.2.0-0.2.gitd0a45fe.module_el8.5.0+108+00865455
    • Affected before 1.2.0-0.2.gitd0a45fe.module_el8.5.0+2635+e4386a39
  • sgabios
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:0.20170427git-3.module_el8.3.0+2048+e7a0a3ea
    • Affected before 1:0.20170427git-3.module_el8.5.0+2608+72063365
  • sgabios-bin
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:0.20170427git-3.module_el8.5.0+2608+72063365
    • Affected before 1:0.20170427git-3.module_el8.6.0+2880+7d9e3703
  • slirp4netns
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.4.2-3.git21fdece.module_el8.5.0+108+00865455
    • Affected before 0.4.2-3.git21fdece.module_el8.5.0+2635+e4386a39
  • udica
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.2.1-2.module_el8.5.0+108+00865455
    • Affected before 0.2.1-2.module_el8.5.0+2635+e4386a39

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • cockpit-podman
    Fixed

    A version is affected if any line below covers it.

    • Affected before 11-1.module_el8.5.0+108+00865455
    • Affected before 11-1.module_el8.5.0+2635+e4386a39
  • containernetworking-plugins
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.8.3-4.module_el8.5.0+108+00865455
    • Affected before 0.8.3-4.module_el8.5.0+2635+e4386a39
  • 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
  • netcf
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.2.8-12.module_el8.3.0+2048+e7a0a3ea
    • Affected before 0.2.8-12.module_el8.5.0+2608+72063365
    • Affected before 0.2.8-12.module_el8.6.0+2880+7d9e3703
  • netcf-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.2.8-12.module_el8.3.0+2048+e7a0a3ea
    • Affected before 0.2.8-12.module_el8.5.0+2608+72063365
    • Affected before 0.2.8-12.module_el8.6.0+2880+7d9e3703
  • netcf-libs
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.2.8-12.module_el8.3.0+2048+e7a0a3ea
    • Affected before 0.2.8-12.module_el8.5.0+2608+72063365
    • Affected before 0.2.8-12.module_el8.6.0+2880+7d9e3703
  • python-podman-api
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1.2.0-0.2.gitd0a45fe.module_el8.5.0+108+00865455
    • Affected before 1.2.0-0.2.gitd0a45fe.module_el8.5.0+2635+e4386a39
  • sgabios
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:0.20170427git-3.module_el8.3.0+2048+e7a0a3ea
    • Affected before 1:0.20170427git-3.module_el8.5.0+2608+72063365
  • sgabios-bin
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1:0.20170427git-3.module_el8.5.0+2608+72063365
    • Affected before 1:0.20170427git-3.module_el8.6.0+2880+7d9e3703
  • slirp4netns
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.4.2-3.git21fdece.module_el8.5.0+108+00865455
    • Affected before 0.4.2-3.git21fdece.module_el8.5.0+2635+e4386a39
  • udica
    Fixed

    A version is affected if any line below covers it.

    • Affected before 0.2.1-2.module_el8.5.0+108+00865455
    • Affected before 0.2.1-2.module_el8.5.0+2635+e4386a39

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 4.2.0-1
  • qemu
    Fixed in 1:4.1-2
  • slirp
    Fixed in 1:1.0.17-11
  • 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 4.2.0-1
  • qemu
    Fixed in 1:4.1-2
  • slirp
    Fixed in 1:1.0.17-11
  • 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 4.2.0-1
  • qemu
    Fixed in 1:4.1-2
  • slirp
    Fixed in 1:1.0.17-11
  • 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-5ubuntu10.43
  • slirp
    Fixed in 1:1.0.17-8ubuntu16.04.1

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-1ubuntu7.23
  • slirp
    Fixed in 1:1.0.17-8ubuntu18.04.1

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 4.1.0-2ubuntu1
  • slirp
    No fix yet
  • slirp4netns
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • slirp
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • slirp
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 25.10

  • slirp
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.04 LTS

  • slirp
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.10

  • slirp
    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+esm4
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • slirp
    Fixed in 1:1.0.17-7+deb8u2build0.14.04.1+esm1
    Available 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.