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HIGH

CVE-2020-35517

CVSS v3

8.2

HIGH

EPSS Score

0.5 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • hivexAlmaLinux:8all versions · fixed in 1.3.18-20.module_el8.3.0+2048+e7a0a3eaand 6 other packages
  • libguestfs-winsupportAlmaLinux:8all versions · fixed in 8.2-1.module_el8.3.0+2048+e7a0a3ea
  • libiscsiAlmaLinux:8all versions · fixed in 1.18.0-8.module_el8.3.0+2048+e7a0a3ea
  • libiscsi-develAlmaLinux:8all versions · fixed in 1.18.0-8.module_el8.5.0+2608+72063365and 1 other package
  • libvirtAlmaLinux:8all versions · fixed in 6.0.0-28.module_el8.3.0+2048+e7a0a3eaand 24 other packages
  • libvirt-dbusAlmaLinux:8all versions · fixed in 1.3.0-2.module_el8.5.0+2608+72063365
  • nbdfuseAlmaLinux:8all versions · fixed in 1.2.2-1.module_el8.5.0+2608+72063365and 1 other package
  • nbdkitAlmaLinux:8all versions · fixed in 1.16.2-4.module_el8.5.0+2608+72063365and 13 other packages

10 more package ranges on OSV.dev

Vendor advisories

  • CVE-2020-35517 Red Hat Product Security2,701 products fixed · 34 known affected

    QEMU: virtiofsd: potential privileged host device access from guest

    qemu-guest-agent (virt:8.2) as a component of Red Hat Enterprise Linux 8 Advanced Virtualization · qemu-guest-agent (virt:8.3) as a component of Red Hat Enterprise Linux 8 Advanced Virtualization · qemu-img (virt:8.2) as a component of Red Hat Enterprise Linux 8 Advanced Virtualization

  • RHSA-2021:0743 Red Hat Product Security918 products fixed

    Red Hat Security Advisory: virt:8.2 and virt-devel:8.2 security update

  • RHSA-2021:0711 Red Hat Product Security838 products fixed

    Red Hat Security Advisory: virt:rhel and virt-devel:rhel security update

  • RHBA-2021:0639 Red Hat Product Security945 products fixed

    Red Hat Bug Fix Advisory: virt:8.3 bug fix and enhancement update

Full record on NVD

Description

A flaw was found in qemu. A host privilege escalation issue was found in the virtio-fs shared file system daemon where a privileged guest user is able to create a device special file in the shared directory and use it to r/w access host devices.

Technical details

Published
2021-01-28

Frequently asked questions

What is CVE-2020-35517?

A flaw was found in qemu. A host privilege escalation issue was found in the virtio-fs shared file system daemon where a privileged guest user is able to create a device special file in the shared directory and use it to r/w access host devices.

Is CVE-2020-35517 actively exploited?

Active exploitation of CVE-2020-35517 has not been confirmed. Its EPSS score was 0.5% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-35517?

CVE-2020-35517 has a CVSS v3 base score of 8.2 (HIGH severity).

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