Ubuntu USN-9003-1 fixes many Linux kernel flaws, including an AMD SEV-SNP memory integrity issue
VULNERABILITYAMDredteam/daily · 1 source
- Severity
- Medium
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What happened
Ubuntu notice USN-9003-1 covers a large Linux kernel update correcting flaws across dozens of subsystems, including drivers, filesystems, networking and security modules. The notable issue is CVE-2023-20585, where some AMD processors did not properly perform Reverse Map Table checks when the IOMMU accessed certain host buffers. A local attacker with hypervisor access could trigger an out-of-bounds condition and compromise the integrity of SEV-SNP guest memory.
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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
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Who reported · 1 outlet
Ubuntu Security Notices
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