[El-errata] New Ksplice updates for RHCK 9 (RHSA-2022:5249)

[Errata Announcements for Oracle Linux]

Synopsis: RHSA-2022:5249 can now be patched using Ksplice
CVEs: CVE-2022-1012 CVE-2022-1729 CVE-2022-1966 CVE-2022-27666 CVE-2022-32250

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle kernel update, RHSA-2022:5249.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running RHCK 9 install
these updates.

On systems that have "autoinstall = yes" in /etc/uptrack/uptrack.conf,
these updates will be installed automatically and you do not need to
take any action.

Alternatively, you can install these updates by running:

# /usr/sbin/uptrack-upgrade -y


DESCRIPTION

* Note: Oracle will not provide a zero-downtime update for CVE-2022-1012.

CVE-2022-1012 describes a flaw in the kernel's port selection algorithm
caused by using a 32-bit hashtable. This flaw might be exploited to
cause a denial-of-service or gain information about the system's port
mapping. Oracle has determined that a rebootless patch for these issues
would not be safe and recommends rebooting.


* CVE-2022-1729: Privilege escalation in Performance Events due to improper locking.

Improper locking in the Performance Events implementation when opening
and associating a performance event to a task/CPU could result in a race
condition. A local, unprivileged user could use this flaw for privilege
escalation.


* CVE-2022-1966, CVE-2022-32250: Code execution in Netfilter due to use-after-free.

A flaw in nftables API of the Netfilter subsystem when removing stateful
expressions could result in a use-after-free. A local user could use
this flaw to cause a denial-of-service or execute arbitrary code.


* CVE-2022-27666: Privilege escalation in IPsec ESP transformation.

A logic flaw in IPsec ESP transformation implementation could lead to
a heap buffer overflow. A local user could use this flaw to overwrite
kernel heap objects and cause privilege escalation.

SUPPORT

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