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Fencer Vulns
medium 5.1

CVE-2026-57965 json

Spice-vdagent: integer overflow in udscs_write() leading to heap buffer overflow

published 2026-06-29 4 mo ago modified 2026-11-05 3 d ago also EUVD-2026-40049

cvss
5.1
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 1%
public exploits
0
none known

Summary

A flaw was found in spice-vdagent. A malicious or compromised SPICE host can trigger an integer overflow by sending a specially crafted message. This vulnerability can lead to a heap buffer overflow, causing the spice-vdagent daemon to crash and resulting in a Denial of Service (DoS) for the virtual machine. 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-2026-57965

  • 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-2026-57965

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-2026-57965 updated cvss 5.1

spice-vdagent: Integer overflow in udscs_write() leading to heap buffer overflow

  • 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

0.11% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.1 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H

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-190 Integer Overflow or Wraparound

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.