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A divide-by-zero 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.

CVE-2025-61554 is a vulnerability identified in the VirtIO network device emulation layer within the BitVisor hypervisor, spanning commits from May 20, 2020, to July 6, 2025. The root cause is a divide-by-zero error triggered by a crafted PCI configuration space access, which is a form of input that the emulated device processes incorrectly. This flaw allows a local attacker with at least limited privileges on the host system to cause a denial of service by crashing the host hypervisor, effectively disrupting all virtual machines managed by BitVisor. The vulnerability does not impact confidentiality or integrity but severely affects availability. The attack vector requires local access and privileges, no user interaction, and has low complexity, meaning it is relatively straightforward to exploit once access is obtained. The vulnerability is classified under CWE-369 (Divide by Zero), indicating improper handling of arithmetic operations leading to runtime errors. No patches or known exploits are currently documented, but the vulnerability has been publicly disclosed with a CVSS v3.1 base score of 5.5, reflecting medium severity. BitVisor is a lightweight hypervisor used primarily in research and specialized environments, which may limit the exposure but still poses risks in affected deployments.

Detailed information about CVE-2025-61554: n/a. Get real-time updates, technical details, and mitigation strategies.

CVE-2025-61554: n/a - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2025-61554: n/a

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