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NVD / CVE Program· CNA mitre

CVE-2020-27617: eth_get_gso_type in net/eth.c in QEMU 4.2.1 allows guest OS users to trigger an assertion failure.

MediumCVSS 6.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 27/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 2.6% (FIRST EPSS); higher than 85.7% of all records.
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: libguestfs-winsupport (AlmaLinux:8) 8.2-1.module_el8.5.0+2608+72063365; libiscsi (AlmaLinux:8) 1.18.0-8.module_el8.6.0+2880+7d9e3703, 1.18.0-8.module_el8.5.0+2608+72063365; libiscsi-devel (AlmaLinux:8) 1.18.0-8.module_el8.6.0+2880+7d9e3703, 1.18.0-8.module_el8.5.0+2608+72063365.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to libguestfs-winsupport (AlmaLinux:8) 8.2-1.module_el8.5.0+2608+72063365; libiscsi (AlmaLinux:8) 1.18.0-8.module_el8.6.0+2880+7d9e3703, 1.18.0-8.module_el8.5.0+2608+72063365; libiscsi-devel (AlmaLinux:8) 1.18.0-8.module_el8.6.0+2880+7d9e3703, 1.18.0-8.module_el8.5.0+2608+72063365 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

eth_get_gso_type in net/eth.c in QEMU 4.2.1 allows guest OS users to trigger an assertion failure. A guest can crash the QEMU process via packet data that lacks a valid Layer 3 protocol.

Published
Nov 6, 2020
Updated
Jun 16, 2026
EPSS
2.6% · 85th percentile

Report tools

JSON

Action score

27

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.6%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
qemuqemu
debiandebian linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux10.0
  • debian debian linux9.0
  • qemu qemu4.2.1

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8libguestfs-winsupportbefore 8.2-1.module_el8.5.0+2608+720633658.2-1.module_el8.5.0+2608+72063365
AlmaLinux:8libiscsibefore 1.18.0-8.module_el8.6.0+2880+7d9e37031.18.0-8.module_el8.6.0+2880+7d9e3703
AlmaLinux:8libiscsibefore 1.18.0-8.module_el8.5.0+2608+720633651.18.0-8.module_el8.5.0+2608+72063365
AlmaLinux:8libiscsi-develbefore 1.18.0-8.module_el8.6.0+2880+7d9e37031.18.0-8.module_el8.6.0+2880+7d9e3703
AlmaLinux:8libiscsi-develbefore 1.18.0-8.module_el8.5.0+2608+720633651.18.0-8.module_el8.5.0+2608+72063365
AlmaLinux:8libiscsi-utilsbefore 1.18.0-8.module_el8.6.0+2880+7d9e37031.18.0-8.module_el8.6.0+2880+7d9e3703
AlmaLinux:8libiscsi-utilsbefore 1.18.0-8.module_el8.5.0+2608+720633651.18.0-8.module_el8.5.0+2608+72063365
AlmaLinux:8libnbdbefore 1.2.2-1.module_el8.5.0+2608+720633651.2.2-1.module_el8.5.0+2608+72063365
AlmaLinux:8libnbd-develbefore 1.2.2-1.module_el8.5.0+2608+720633651.2.2-1.module_el8.5.0+2608+72063365
AlmaLinux:8libvirt-dbusbefore 1.3.0-2.module_el8.5.0+2608+720633651.3.0-2.module_el8.5.0+2608+72063365
AlmaLinux:8libvirt-dbusbefore 1.3.0-2.module_el8.6.0+2880+7d9e37031.3.0-2.module_el8.6.0+2880+7d9e3703
AlmaLinux:8nbdfusebefore 1.2.2-1.module_el8.5.0+2608+720633651.2.2-1.module_el8.5.0+2608+72063365
AlmaLinux:8nbdkitbefore 1.16.2-4.module_el8.5.0+2608+720633651.16.2-4.module_el8.5.0+2608+72063365
AlmaLinux:8nbdkit-bash-completionbefore 1.16.2-4.module_el8.5.0+2608+720633651.16.2-4.module_el8.5.0+2608+72063365
AlmaLinux:8nbdkit-basic-filtersbefore 1.16.2-4.module_el8.5.0+2608+720633651.16.2-4.module_el8.5.0+2608+72063365
AlmaLinux:8nbdkit-basic-pluginsbefore 1.16.2-4.module_el8.5.0+2608+720633651.16.2-4.module_el8.5.0+2608+72063365
AlmaLinux:8nbdkit-curl-pluginbefore 1.16.2-4.module_el8.5.0+2608+720633651.16.2-4.module_el8.5.0+2608+72063365
AlmaLinux:8nbdkit-develbefore 1.16.2-4.module_el8.5.0+2608+720633651.16.2-4.module_el8.5.0+2608+72063365
AlmaLinux:8nbdkit-example-pluginsbefore 1.16.2-4.module_el8.5.0+2608+720633651.16.2-4.module_el8.5.0+2608+72063365
AlmaLinux:8nbdkit-gzip-pluginbefore 1.16.2-4.module_el8.5.0+2608+720633651.16.2-4.module_el8.5.0+2608+72063365
AlmaLinux:8nbdkit-linuxdisk-pluginbefore 1.16.2-4.module_el8.5.0+2608+720633651.16.2-4.module_el8.5.0+2608+72063365
AlmaLinux:8nbdkit-python-pluginbefore 1.16.2-4.module_el8.5.0+2608+720633651.16.2-4.module_el8.5.0+2608+72063365
AlmaLinux:8nbdkit-serverbefore 1.16.2-4.module_el8.5.0+2608+720633651.16.2-4.module_el8.5.0+2608+72063365
AlmaLinux:8nbdkit-ssh-pluginbefore 1.16.2-4.module_el8.5.0+2608+720633651.16.2-4.module_el8.5.0+2608+72063365

+96

Same product

qemu: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-12928The QMP migrate command in QEMU version 4.0.0 and earlier is vulnerable to OS command injection, which allows the remote attacker to…
    60This week
  • CVE-2015-8556Local privilege escalation vulnerability in the Gentoo QEMU package before 2.5.0-r1.
    44Plan
  • CVE-2017-15118A stack-based buffer overflow vulnerability was found in NBD server implementation in qemu before 2.11 allowing a client to request an…
    43Plan

Published before and after this one in the same product

  • ← EarlierCVE-2020-24352Oct 16, 2020 · An issue was discovered in QEMU through 5.1.0.
    22Monitor
  • ← EarlierCVE-2020-27616Nov 6, 2020 · ati_2d_blt in hw/display/ati_2d.c in QEMU 4.2.1 can encounter an outside-limits situation in a calculation.
    27Monitor
  • Later →CVE-2020-25624Nov 30, 2020 · hw/usb/hcd-ohci.c in QEMU 5.0.0 has a stack-based buffer over-read via values obtained from the host controller driver.
    20Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:libguestfs-winsupport8.2-1.module_el8.5.0+2608+72063365 · AlmaLinux:8Package registry (OSV)
almalinux:libiscsi1.18.0-8.module_el8.6.0+2880+7d9e3703 · AlmaLinux:8Package registry (OSV)
almalinux:libiscsi-devel1.18.0-8.module_el8.6.0+2880+7d9e3703 · AlmaLinux:8Package registry (OSV)
almalinux:libiscsi-utils1.18.0-8.module_el8.6.0+2880+7d9e3703 · AlmaLinux:8Package registry (OSV)
almalinux:libnbd1.2.2-1.module_el8.5.0+2608+72063365 · AlmaLinux:8Package registry (OSV)
almalinux:libnbd-devel1.2.2-1.module_el8.5.0+2608+72063365 · AlmaLinux:8Package registry (OSV)
almalinux:libvirt-dbus1.3.0-2.module_el8.6.0+2880+7d9e3703 · AlmaLinux:8Package registry (OSV)
almalinux:nbdfuse1.2.2-1.module_el8.5.0+2608+72063365 · AlmaLinux:8Package registry (OSV)
almalinux:nbdkit1.16.2-4.module_el8.5.0+2608+72063365 · AlmaLinux:8Package registry (OSV)
almalinux:nbdkit-bash-completion1.16.2-4.module_el8.5.0+2608+72063365 · AlmaLinux:8Package registry (OSV)
almalinux:nbdkit-basic-filters1.16.2-4.module_el8.5.0+2608+72063365 · AlmaLinux:8Package registry (OSV)
almalinux:nbdkit-basic-plugins1.16.2-4.module_el8.5.0+2608+72063365 · AlmaLinux:8Package registry (OSV)
alpine:qemu5.0.0-r0 · Alpine:v3.16Package registry (OSV)
debian:qemu1:5.2+dfsg-1 · Debian:12Package registry (OSV)
opensuse:qemu4.2.1-lp152.9.12.1 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:qemu-linux-user4.2.1-lp152.9.12.1 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:qemu-testsuite4.2.1-lp152.9.12.1 · openSUSE:Leap 15.2Package registry (OSV)
red hat:hivex0:1.3.18-20.module+el8.3.0+6124+819ee737 · Red Hat:advanced_virtualization:8.3::el8Package registry (OSV)
red hat:hivex-debuginfo0:1.3.18-20.module+el8.3.0+6124+819ee737 · Red Hat:advanced_virtualization:8.3::el8Package registry (OSV)
red hat:hivex-debugsource0:1.3.18-20.module+el8.3.0+6124+819ee737 · Red Hat:advanced_virtualization:8.3::el8Package registry (OSV)
red hat:hivex-devel0:1.3.18-20.module+el8.3.0+6124+819ee737 · Red Hat:advanced_virtualization:8.3::el8Package registry (OSV)
red hat:libguestfs1:1.42.0-2.module+el8.3.0+6798+ad6e66be · Red Hat:advanced_virtualization:8.3::el8Package registry (OSV)
red hat:libguestfs-bash-completion1:1.42.0-2.module+el8.3.0+6798+ad6e66be · Red Hat:advanced_virtualization:8.3::el8Package registry (OSV)
red hat:libguestfs-debuginfo1:1.42.0-2.module+el8.3.0+6798+ad6e66be · Red Hat:advanced_virtualization:8.3::el8Package registry (OSV)
red hat:libguestfs-debugsource1:1.42.0-2.module+el8.3.0+6798+ad6e66be · Red Hat:advanced_virtualization:8.3::el8Package registry (OSV)
red hat:libguestfs-devel1:1.42.0-2.module+el8.3.0+6798+ad6e66be · Red Hat:advanced_virtualization:8.3::el8Package registry (OSV)
red hat:libguestfs-gfs21:1.42.0-2.module+el8.3.0+6798+ad6e66be · Red Hat:advanced_virtualization:8.3::el8Package registry (OSV)
red hat:libguestfs-gobject1:1.42.0-2.module+el8.3.0+6798+ad6e66be · Red Hat:advanced_virtualization:8.3::el8Package registry (OSV)
red hat:SLOF0:20200717-1.gite18ddad8.module+el8.3.0+7638+07cf13d2 · Red Hat:advanced_virtualization:8.3::el8Package registry (OSV)
rocky linux:hivex0:1.3.18-21.module+el8.4.0+642+7e26f5e1 · Rocky Linux:8Package registry (OSV)

+12

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-617 · Reachable Assertion

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records