CVE-2022-49611

x86/speculation: Fill RSB on vmexit for IBRS

Published: 2/26/2025 Last updated: 12/23/2025 Reserved: 2/26/2025

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.

CNA assigner: Linux (416baaa9-dc9f-4396-8d5f-8c081fb06d67) Requested by: n/a

Opam packages affected (28)

albatross cdrom conf-bpftool conf-libbpf conf-linux-libc-dev core core_unix hvsock mirage-block-unix mm ocaml-probes orun rawlink rawlink-eio rawlink-lwt restricted shell solo5 solo5-bindings-hvt solo5-bindings-spt solo5-cross-aarch64 solo5-kernel-ukvm tracy-client tuntap uring vhd-format vhd-format-lwt xapi-stdext-unix

Products affected (3)

Product	Vendor	Version
Linux	Linux	3.1.0 p8
Linux	Linux	<= 6.1.*
Linux	Linux	Snapdragon 8+ Gen 2 Mobile Platform

CVE-2022-49611

x86/speculation: Fill RSB on vmexit for IBRS

Opam packages affected (28)

Products affected (3)

References (14)