Red Hat Security Advisory 2020-4060-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include buffer overflow, bypass, denial of service, information leakage, memory leak, null pointer, out of bounds read, out of bounds write, privilege escalation, and use-after-free vulnerabilities.
c6fe9b1ac74526ab1e05aa960ec4c626b83f18c09caa7217cd9c791d10b25a47Red Hat Security Advisory 2020-4062-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include buffer overflow, bypass, denial of service, information leakage, memory leak, null pointer, out of bounds read, out of bounds write, privilege escalation, and use-after-free vulnerabilities.
5b17076e282255b698daed5fc30ba5890cff82dd91acb84b20b366e419d1b690Ubuntu Security Notice 4302-1 - Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel could improperly let a nested guest access the resources of a parent guest in certain situations. An attacker could use this to expose sensitive information. Gregory Herrero discovered that the fix for CVE-2019-14615 to address the Linux kernel not properly clearing data structures on context switches for certain Intel graphics processors was incomplete. A local attacker could use this to expose sensitive information. Various other issues were also addressed.
3f65e5ffbc3857537bf6869a1491356bedce6b14cb08f5e1b25c6d6d2862ecd3Ubuntu Security Notice 4300-1 - It was discovered that the KVM implementation in the Linux kernel, when paravirtual TLB flushes are enabled in guests, the hypervisor in some situations could miss deferred TLB flushes or otherwise mishandle them. An attacker in a guest VM could use this to expose sensitive information. Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel could improperly let a nested guest access the resources of a parent guest in certain situations. An attacker could use this to expose sensitive information. Various other issues were also addressed.
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