Out-of-bounds write in Oracle VM VirtualBox PCNet network model
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
Oracle VM VirtualBox before 7.2.8 is affected. A flaw in the PCNet (Am79C970A) network device model causes an out-of-bounds write (CWE-787) in the host OS. A guest OS user with no privileges can corrupt host memory, which affects integrity and availability.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
Oracle VM VirtualBox before 7.2.8 allows guest OS users to cause an out-of-bounds write in the host OS in pcnetReceiveNoSync in DevPCNet.cpp in the PCNet (Am79C970A) network device model.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
Upgrade Oracle VM VirtualBox to version 7.2.8 or later.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Timeline
- 2026-10-06 Threatist record created from CVE-2026-77178
- 2026-10-06 Alias added: GHSA-65c9-4f8q-72qc
- 2026-10-06 CVSS score added · CISA ADP
- 2026-10-06 Weakness changed · CISA ADP
- 2026-10-06 CISA SSVC decision points changed
- 2026-10-06 Priority changed: LOW → MEDIUM
References
Sources
- CVE-2026-77178 · CVE Program
- CVE-2026-77178 · NVD
- FIRST EPSS
- GHSA-65c9-4f8q-72qc · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences