Two vulnerabilities have been reported in the Linux Kernel, which can be exploited by malicious, local users and malicious people to cause a DoS (Denial of Service).
1) An error when handling certain NFSv4 responses to ACL attribute requests can be exploited to e.g. cause a crash by connecting to a malicious NFSv4 server.
2) A NULL pointer dereference error in the "user_update()" function (security/keys/user_defined.c) when updating a user-defined type negative key into an instantiated key can be exploited to cause a crash.
Solution: Fixed in the GIT repository.
Provided and/or discovered by: 1) Andy Adamson
2) David Howells
Original Advisory: Andy Adamson:
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Subject: Linux Kernel Two Denial of Service Vulnerabilities
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