[Ksplice][Ubuntu-Oracle-Updates] No Ksplice updates for Ubuntu OCI kernel (USN-5319-1)

[Oracle Ksplice]

Synopsis: USN-5319-1 can not be patched using Ksplice
CVEs: CVE-2021-26341 CVE-2021-26401 CVE-2022-0001 CVE-2022-0002

NOTE

Oracle will not provide a zero downtime update for CVE-2022-0001, CVE-2022-0002, CVE-2021-26401 and CVE-2021-26341.

On the 8th of March 2022, Vrije Universiteit (VU) Amsterdam
researchers, AMD, Ampere, ARM and Intel jointly reported new
security vulnerabilities based on Branch Target
Injection (BTI) (commonly called Spectre v2 variants).

The reporters recommend disabling unprivileged BPF to mitigate
this vulnerability as well as using generic retpoline even when
eIBRS is available on the platform or on special AMD/Hygon CPUs.

Unprivileged BPF can already be disabled at runtime by setting
the kernel.unprivileged_bpf_disabled sysctl.

If your CPU is affected and is not already using retpoline as the
Spectre V2 mitigation, a reboot into the newest kernel will be
required in order to get the full retpoline mitigations in place.

SUPPORT

Ksplice support is available at ksplice-support_ww at oracle.com.