---
id: CVE-2026-57965
title: >-
  Spice-vdagent: integer overflow in udscs_write() leading to heap buffer
  overflow
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 c…
severity: medium
cvss: 5.1
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H'
cvssSource: cna
cwe:
  - CWE-190
vendor: Red Hat
product: spice-vdagent
affected:
  - spice-vdagent (all versions)
  - spice-vdagent (all versions)
  - spice-vdagent (all versions)
  - mingw-spice-vdagent (all versions)
  - spice-vdagent (all versions)
  - spice-vdagent (all versions)
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-06-29T10:43:01.020584Z'
published: '2026-06-29'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T22:16:53.039Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-57965'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-57965'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2493581'
    label: RHBZ#2493581
tags:
  - cve.org
epss: 0.00113
epssPercentile: 0.01444
ingestedAt: '2026-11-05T23:41:31.950Z'
---

## Overview

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.

## Affected

- `spice-vdagent (all versions)`
- `spice-vdagent (all versions)`
- `spice-vdagent (all versions)`
- `mingw-spice-vdagent (all versions)`
- `spice-vdagent (all versions)`
- `spice-vdagent (all versions)`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.