The compat_alloc_user_space functions in include/asm/compat.h files in the Linux kernel prior to 2.6.36-rc4-git2 on 64-bit platforms do not properly allocate the userspace memory required for the 32-bit compatibility layer, which allows local users to gain privileges by leveraging the ability of the compat_mc_getsockopt function (aka the MCAST_MSFILTER getsockopt support) to control a certain length value, related to a "stack pointer underflow" issue, as exploited in the wild in September 2010.
Vulnerable Product | Search on Vulmon | Subscribe to Product |
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linux linux kernel 2.6.36 |
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linux linux kernel |
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vmware esx 4.1 |
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vmware esx 4.0 |
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suse suse linux enterprise server 11 |
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suse suse linux enterprise desktop 11 |