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

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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

b9cdaaf0a3becc52e8b4662fef28c452c4f009b4 to < 3d323b99ff5c8c57005184056d65f6af5b0479d8affected
117cc7a908c83697b0b737d15ae1eb5943afe35b to < f744b88dfc201bf8092833ec70b23c720188b527affected
117cc7a908c83697b0b737d15ae1eb5943afe35b to < 17a9fc4a7b91f8599223631bb6ae6416bc0de1c0affected
117cc7a908c83697b0b737d15ae1eb5943afe35b to < 4d7f72b6e1bc630bec7e4cd51814bc2b092bf153affected
117cc7a908c83697b0b737d15ae1eb5943afe35b to < 8d5cff499a6d740c91ff37963907e0e983c37f0faffected
117cc7a908c83697b0b737d15ae1eb5943afe35b to < 8c38306e2e9257af4af2819aa287a4711ff36329affected
117cc7a908c83697b0b737d15ae1eb5943afe35b to < 9756bba28470722dacb79ffce554336dd1f6a6cdaffected
68d1f7a3f1a35639a563bbad768d5df885b4ff05affected
20e080e2752d108388d386ecc0b33d7797dfb18faffected
eebc3f8adee0a6f43a4789ef0bf5c5b35de8cfe4affected
c1ddd99a029636e234a800f28790a60d6ac0318faffected
4.14.14 to < 4.14.297affected
3.2.101 to < 3.3affected
3.16.56 to < 3.17affected
4.4.113 to < 4.5affected
4.9.77 to < 4.10affected

Linux Linux

Default version status: affected

4.15affected
0 to < 4.15unaffected
4.14.297 to ≤ 4.14.*unaffected
4.19.266 to ≤ 4.19.*unaffected
5.4.217 to ≤ 5.4.*unaffected
5.10.133 to ≤ 5.10.*unaffected
5.15.57 to ≤ 5.15.*unaffected
5.18.14 to ≤ 5.18.*unaffected
5.19 to ≤ *unaffected

CVE-2022-49611

x86/speculation: Fill RSB on vmexit for IBRS

Description

Affected products

Linux Linux

Linux Linux

References