Ubuntu USN-9003-1 fixes many Linux kernel flaws, including an AMD SEV-SNP memory integrity issue
VULNERABILITYAMDredteam/daily · 1 source
- Severity
- Medium
- Sources
- 1
What happened
USN-9003-1 is an Ubuntu kernel update addressing many issues across architectures and subsystems. The highlighted flaw is CVE-2023-20585: some AMD processors did not properly perform Reverse Map Table (RMP) checks when the IOMMU accessed certain host buffers, allowing a local attacker with hypervisor access to trigger an out-of-bounds condition and compromise SEV-SNP guest memory integrity. The article does not list affected kernel versions or fixed package versions. Defenders should apply the kernel update from the USN-9003-1 notice and check that SEV-SNP hosts are patched.
For security analysts · Written by AI from 1 source · Wrong?
What to do
- Install the Linux kernel update described in Ubuntu security notice USN-9003-1.
- Reboot systems after the kernel update so the fixes take effect.
- Check whether you run AMD SEV-SNP virtual machines and prioritise those hosts for patching.
Written by AI from the sources, checked against them
Full story timeline · 1 update
Who reported · 1 outlet
Ubuntu Security Notices
Who and what is in it
Companies
Products