x86/speculation: Fill RSB on vmexit for IBRS (CVE-2022-49611)

Summary

x86/speculation: Fill RSB on vmexit for IBRS

Original description

The description as published by the source.

In the Linux kernel, the following vulnerability has been resolved:

x86/speculation: Fill RSB on vmexit for IBRS

Prevent RSB underflow/poisoning attacks with RSB. While at it, add a
bunch of comments to attempt to document the current state of tribal
knowledge about RSB attacks and what exactly is being mitigated.

Source: OSV.dev (Open Source Vulnerabilities) NVD OSV

Affected packages

Linux Kernel

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.14.297"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.15.0"},{"fixed":"4.19.266"},{"fixed":"5.4.217"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.20.0"},{"fixed":"5.10.133"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.15.57"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.18.14"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

Debian DEBIAN-CVE-2022-49611 linux Fixed in: 5.10.136-1
Ubuntu UBUNTU-CVE-2022-49611 linux-aws Fixed in: 4.4.0-1120.126

Summary

Original description

Affected packages

Fix status by distribution

References