Affected: AMD EPYC™ 7001 Processors, AMD Athlon™ 3000 Series Processors with Radeon™ Graphics, AMD Ryzen™ 3000 Series Processors with Radeon™ Graphics, AMD Athlon™ PRO 3000 Series Processors with Radeon™ Vega Graphics, AMD Ryzen™ PRO 3000 Series Processors with Radeon™ Vega Graphics

A division-by-zero error on some AMD processors can potentially return speculative data resulting in loss of confidentiality.

Affected: Ubuntu:22.04:LTS: linux-aws-6.2, Ubuntu:22.04:LTS: linux-azure-6.2, Ubuntu:22.04:LTS: linux-azure-fde-6.2, Ubuntu:22.04:LTS: linux-gcp-6.2, Ubuntu:22.04:LTS: linux-hwe-6.2, Ubuntu:22.04:LTS: linux-lowlatency-hwe-6.2

Jana Hofmann, Emanuele Vannacci, Cedric Fournet, Boris Kopf, and Oleksii Oleksenko discovered that some AMD processors could leak stale data from division operations in certain situations. A local attacker could possibly use this to expose sensitive information. (CVE-2023-20588)

It was discovered that the ARM64 KVM implementation in the Linux kernel did not properly restrict hypervisor memory access. An attacker in a guest VM could use this to execute arbitrary code in the host OS. (CVE-2023-21264)

It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle L2CAP socket release, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-40283)

It was discovered that some network classifier implementations in the Linux kernel contained use-after-free vulnerabilities. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-4128)

Lonial Con discovered that the netfilter subsystem in the Linux kernel contained a memory leak when handling certain element flush operations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2023-4569)