Memory Overwrite Vulnerability in gVisor's Shared Memory Handling

CVE-2018-19333 · HIGH Severity

AV:N/AC:L/AU:N/C:P/I:P/A:P

pkg/sentry/kernel/shm/shm.go in Google gVisor before 2018-11-01 allows attackers to overwrite memory locations in processes running as root (but not escape the sandbox) via vectors involving IPC_RMID shmctl calls, because reference counting is mishandled.

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