CVE-2022-49611

x86/speculation: Fill RSB on vmexit for IBRS

MEDIUM

5.5

CVSS Score

Published: February 26, 2025 at 02:23 AM UTC

Updated: June 17, 2026 at 05:18 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.3%

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

v ≥ 3.16.56v ≥ 3.2.101v ≥ 4.4.113v ≥ 4.9.77v < 4.14.2973.16.56 ≤ v < 3.173.2.101 ≤ v < 3.34.14.14 ≤ v < 4.14.2974.15 ≤ v < 4.19.2664.15 ≤ v < 5.10.1334.15 ≤ v < 5.15.574.15 ≤ v < 5.18.144.15 ≤ v < 5.194.15 ≤ v < 5.4.2174.20 ≤ v < 5.4.2174.4.113 ≤ v < 4.54.9.77 ≤ v < 4.105.11 ≤ v < 5.15.575.16 ≤ v < 5.18.145.5 ≤ v < 5.10.133117cc7a908c83697b0b737d15ae1eb5943afe35b20e080e2752d108388d386ecc0b33d7797dfb18f3.16.56 3.2.101 4.14.14 4.15 4.4.113 4.9.77 5.19 rc1 5.19 rc2 5.19 rc3 5.19 rc4 5.19 rc5 5.19 rc668d1f7a3f1a35639a563bbad768d5df885b4ff05b9cdaaf0a3becc52e8b4662fef28c452c4f009b4c1ddd99a029636e234a800f28790a60d6ac0318feebc3f8adee0a6f43a4789ef0bf5c5b35de8cfe4

Vendor states this is fixed in 17a9fc4a7b91f8599223631bb6ae6416bc0de1c0 (fixed)

Vendor states this is fixed in 3d323b99ff5c8c57005184056d65f6af5b0479d8 (fixed)

Vendor states this is fixed in 4d7f72b6e1bc630bec7e4cd51814bc2b092bf153 (fixed)

Vendor states this is fixed in 8c38306e2e9257af4af2819aa287a4711ff36329 (fixed)

Vendor states this is fixed in 8d5cff499a6d740c91ff37963907e0e983c37f0f (fixed)

Vendor states this is fixed in 9756bba28470722dacb79ffce554336dd1f6a6cd (fixed)

Vendor states this is fixed in f744b88dfc201bf8092833ec70b23c720188b527 (fixed)

Affected range stops below 3.17, so it looks safe — our inference, not a vendor statement

Affected range stops below 3.3, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.10, so it looks safe — our inference, not a vendor statement

Vendor states this is fixed in 4.14.297 (unaffected)

Vendor states this is fixed in 4.15 (unaffected)

Vendor states this is fixed in 4.19.266 (unaffected)

Affected range stops below 4.5, so it looks safe — our inference, not a vendor statement

Vendor states this is fixed in 5.10.133 (unaffected)

Vendor states this is fixed in 5.15.57 (unaffected)

Vendor states this is fixed in 5.18.14 (unaffected)

Vendor states this is fixed in 5.19 (unaffected)

Vendor states this is fixed in 5.4.217 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references