CVE-2026-57965
spice-vdagent: Integer overflow in udscs_write() leading to heap buffer overflow
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 27, 2026
Updated · August 18, 2026
Description
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.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.1CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H
CWE-190 · Integer Overflow or Wraparound