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Vulnerability record · CVE-2025-61553 · published 16 October 2025

CVE-2025-61553: Heap-based buffer overflow vulnerability

An out-of-bounds write in VirtIO network device emulation in BitVisor from commit 108df6 (2020-05-20) to commit 480907 (2025-07-06) allows local attackers to cause a denial of service (host hypervisor crash) via a crafted PCI configuration space access. Given it's a heap overflow in a privileged hypervisor context, exploitation may enable arbitrary code execution or guest-to-host privilege escalation.

8.2 CVSS 3.1 High EPSS 0.21% · top 89.9% CWE-122 · Heap-based buffer overflowCWE-787 · Out-of-bounds write Deferred
8.2CVSS 3.1 base score
0.21%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

An out-of-bounds write in VirtIO network device emulation in BitVisor from commit 108df6 (2020-05-20) to commit 480907 (2025-07-06) allows local attackers to cause a denial of service (host hypervisor crash) via a crafted PCI configuration space access. Given it's a heap overflow in a privileged hypervisor context, exploitation may enable arbitrary code execution or guest-to-host privilege escalation.

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

References

LinkTags
https://github.com/retrage/advisories/blob/main/CVE-2025-61553/README.md
https://sourceforge.net/p/bitvisor/code/ci/48090711ade5910b601d2b0034859a6a890cc82d/

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Source: NIST National Vulnerability Database (record CVE-2025-61553), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.