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Ubuntu Security Notice USN-6383-1
Posted Sep 20, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6383-1 - 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. 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.

tags | advisory, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2023-20588, CVE-2023-21264, CVE-2023-40283, CVE-2023-4128, CVE-2023-4569
SHA-256 | c5be03314d6525a0dd88d31e6ba90e7d12a4b76d20a1e301e71a80a7805ade26

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