CVE-2026-95702 Code Execution in Host Sentry Process via Double Free in gVisor VFS MemoryFile
A local attacker in a container can achieve code execution in the host sentry process via a double-free vulnerability in gVisor's VFS MemoryFile.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-95702?
CVE-2026-95702 is a high-severity use after free vulnerability in Google gVisor, published on 9 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Use-after-free vulnerability in VFS in Google gVisor prior to release 20260831.0 on all platforms allows a local attacker with standard container privileges to achieve code execution in the host sentry process by double-freeing the backing MemoryFile from an in-sandbox overlay filesystem. The sentry process remains confined by host-level Linux seccomp and namespace boundaries.
Which versions are affected by CVE-2026-95702?
How do I fix CVE-2026-95702?
No fix has been published for CVE-2026-95702 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-95702 being exploited?
There is no known exploitation of CVE-2026-95702 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-95702, GHSA-hv4v-f9v2-r8c2, UBUNTU-CVE-2026-95702.