Ubuntu has issued an update for the kernel. This fixes some vulnerabilities, which can be exploited by malicious, local users to cause a DoS (Denial of Service), bypass certain security restrictions, disclose potentially sensitive information, and gain escalated privileges, and malicious people to cause a DoS and potentially compromise a vulnerable system.
1) A race condition error in the "ptrace()" implementation can be exploited to crash the kernel.
2) A vulnerability is caused due to missing feature length validation within the "dccp_feat_change()" function in net/dccp/feat.c, which can be exploited to cause an overflow and execute arbitrary code with kernel privileges.
3) An unspecified error in the 32-bit and 64-bit emulation can be exploited to disclose potentially sensitive data via a specially crafted binary.
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Subject: Ubuntu update for kernel
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