Debian Security Advisory 1458-1 - A race condition in the OpenAFS fileserver allows remote attackers to cause a denial of service (daemon crash) by simultaneously acquiring and giving back file callbacks, which causes the handler for the GiveUpAllCallBacks RPC to perform linked-list operations without the host_glock lock.
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Gentoo Linux Security Advisory GLSA 200801-04 - Russ Allbery, Jeffrey Altman, Dan Hyde and Thomas Mueller discovered a race condition due to an improper handling of the clients callbacks lists. Versions less than 1.4.6 are affected.
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