CVE-2022-49611: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Linux Linux Kernel: before 4.14.297 (fixed in 4.14.297); from 4.15, before 4.19.266 (fixed in 4.19.266); from 4.20, before 5.4.217 (fixed in 5.4.217); from 5.5, before 5.10.133 (fixed in 5.10.133); from 5.11, before 5.15.57 (fixed in 5.15.57); from 5.16, before 5.18.14 (fixed in 5.18.14); …

Published 2025-02-26. Last modified 2026-06-17.