Vulnerability · Published Jun 29, 2026 · Assigned by redhat
CVE-2026-57965Spice-vdagent: integer overflow in udscs_write() leading to heap buffer overflow
Medium 5.1
In plain English
A medium-severity integer overflow in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | spice-vdagent | 0.22.1-3+deb12u1 | DEBIAN-CVE-2026-57965 |
| Debian:13 | spice-vdagent | no fix listed | DEBIAN-CVE-2026-57965 |
| Debian:14 | spice-vdagent | 0.23.0-3 | DEBIAN-CVE-2026-57965 |
| Ubuntu:22.04:LTS | spice-vdagent | 0.22.1-1ubuntu0.1 | UBUNTU-CVE-2026-57965 |
| Ubuntu:22.04:LTS | spice-vdagent | 0.22.1-1ubuntu0.1 | USN-8723-1 |
| Ubuntu:24.04:LTS | spice-vdagent | 0.22.1-4ubuntu0.1 | USN-8723-1 |
| Ubuntu:24.04:LTS | spice-vdagent | 0.22.1-4ubuntu0.1 | UBUNTU-CVE-2026-57965 |
| Ubuntu:25.10 | spice-vdagent | no fix listed | UBUNTU-CVE-2026-57965 |
| Ubuntu:26.04:LTS | spice-vdagent | 0.23.0-1ubuntu0.1 | USN-8723-1 |
| Ubuntu:26.04:LTS | spice-vdagent | 0.23.0-1ubuntu0.1 | UBUNTU-CVE-2026-57965 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 6 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
Weakness: CWE-190 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H
References
- https://access.redhat.com/security/cve/CVE-2026-57965 vdb-entry, x_refsource_REDHAT
- RHBZ#2493581 issue-tracking, x_refsource_REDHAT