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Fencer Vulns
medium 4.4

CVE-2026-57966 json

Spice-vdagent: path traversal in file transfer via unsanitized filename

published 2026-06-29 4 mo ago modified 2026-11-05 3 d ago also EUVD-2026-40050

cvss
4.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits
0
none known

Summary

A path traversal vulnerability was found in spice-vdagent. This flaw allows a malicious or compromised SPICE host to write arbitrary files to any location on the guest operating system. This occurs because the filename provided by the SPICE host during file transfers is not properly sanitized before being used. An attacker could exploit this to write to sensitive locations with the privileges of the spice-vdagent process, typically the logged-in user. This issue requires the SPICE host to be untrusted or compromised for exploitation.

Patch / fix

  • spice-vdagent Debian 12 0.22.1-3+deb12u1
  • spice-vdagent Debian 14 0.23.0-3

debian advisories DEBIAN-CVE-2026-57966

  • spice-vdagent Ubuntu 22.04 LTS 0.22.1-1ubuntu0.1
  • spice-vdagent Ubuntu 24.04 LTS 0.22.1-4ubuntu0.1
  • spice-vdagent Ubuntu 26.04 LTS 0.23.0-1ubuntu0.1

ubuntu advisories UBUNTU-CVE-2026-57966

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • spice-vdagent SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES 15 SP6-LTSS +4 more 0.22.1-150500.4.3.1
  • spice-vdagent SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +1 more 0.21.0-150300.3.6.1
  • spice-vdagent SLES for SAP applications 16.0, SLES 16.0 0.22.1-160000.3.1
  • spice-vdagent SLES LTSS Extended Security 12 SP5, SLES for SAP 12 SP5, SLES 12 SP5-LTSS 0.16.0-8.13.2

suse advisories SUSE-SU-2026:3585-1SUSE-SU-2026:3485-1SUSE-SU-2026:3470-1SUSE-SU-2026:23109-1

  • spice-vdagent openSUSE Leap 16.0 0.22.1-160000.3.1
  • spice-vdagent openSUSE Tumbleweed 0.23.0-4.1

opensuse advisories openSUSE-SU-2026:21506-1openSUSE-SU-2026:11379-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-57966 updated cvss 4.4

spice-vdagent: Path traversal in file transfer via unsanitized filename

  • Red Hat Enterprise Linux 6 spice-vdagent Red Hat Enterprise Linux 7 spice-vdagent Red Hat Enterprise Linux 8 spice-vdagent, mingw32-spice-vdagent, mingw64-spice-vdagent Red Hat Enterprise Linux 9 spice-vdagent Red Hat Enterprise Linux 10 spice-vdagent
    affected: no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
4 mo ago

Exploit prediction

0.13% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.4 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.