Race condition in keyctl_read_key function in Linux kernel before 4.3.4 allows for denial of service or other impact

CVE-2015-7550 · MEDIUM Severity

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

The keyctl_read_key function in security/keys/keyctl.c in the Linux kernel before 4.3.4 does not properly use a semaphore, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted application that leverages a race condition between keyctl_revoke and keyctl_read calls.

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