Red Hat Security Advisory 2017-1615-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: A flaw was found in the way Linux kernel allocates heap memory to build the scattergather list from a fragment list->frag_list) in the socket buffer. The heap overflow occurred if 'MAX_SKB_FRAGS + 1' parameter and 'NETIF_F_FRAGLIST' feature were used together. A remote user or process could use this flaw to potentially escalate their privilege on a system.
f1988095293b1d64049e46bd41403517aff425f5b6ac9160c3403479e585fd90Red Hat Security Advisory 2017-1616-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix: A flaw was found in the way memory was being allocated on the stack for user space binaries. If heap and stack memory regions were adjacent to each other, an attacker could use this flaw to jump over the stack guard gap, cause controlled memory corruption on process stack or the adjacent memory region, and thus increase their privileges on the system. This is a kernel-side mitigation which increases the stack guard gap size from one page to 1 MiB to make successful exploitation of this issue more difficult.
8aecb00d2b9667bdf5d8c27595fddfad109f0a2bfd6bc403167c8298e434ebc5Ubuntu Security Notice 3293-1 - Dmitry Vyukov discovered that KVM implementation in the Linux kernel improperly emulated the VMXON instruction. A local attacker in a guest OS could use this to cause a denial of service in the host OS. Dmitry Vyukov discovered that the generic SCSI subsystem in the Linux kernel contained a stack-based buffer overflow. A local attacker with access to an sg device could use this to cause a denial of service or possibly execute arbitrary code. Various other issues were also addressed.
28157ece7b6c36fc871846f3ef26802654c9896b6d03a1845e875c1ba8ff42c5Ubuntu Security Notice 3292-2 - USN-3292-1 fixed a vulnerability in the Linux kernel for Ubuntu 16.10. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 16.10 for Ubuntu 16.04 LTS. Jason Donenfeld discovered a heap overflow in the MACsec module in the Linux kernel. An attacker could use this to cause a denial of service or possibly execute arbitrary code.
c70c25536e78eb1d5e5730eb6cfcbdfa1a826986f0778fd2b9aafa9670420171Ubuntu Security Notice 3292-1 - Jason Donenfeld discovered a heap overflow in the MACsec module in the Linux kernel. An attacker could use this to cause a denial of service or possibly execute arbitrary code.
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