Description: Bypassing Spectre-BTI User Space Mitigations
References:
 https://www.openwall.com/lists/oss-security/2023/02/03/1
 https://github.com/google/security-research/security/advisories/GHSA-9x5g-vmxf-4qj8#event-88245
 https://github.com/es0j/CVE-2023-0045
Notes:
Bugs:
upstream: released (6.2-rc3) [a664ec9158eeddd75121d39c9a0758016097fa96]
5.10-upstream-stable: released (5.10.163) [67e39c4f4cb318cfbbf8982ab016c649ed97edaf]
4.19-upstream-stable: released (4.19.270) [940ede60d74d2fc7291b96cb38072d705333c8e0]
sid: released (6.1.7-1)
5.10-bullseye-security: released (5.10.178-1)
4.19-buster-security: released (4.19.282-1)