[Ksplice][RHEL8-Updates] New Ksplice updates for RHEL 8 (ELSA-2021-3057)
Oracle Ksplice
ksplice-support_ww at oracle.com
Thu Aug 12 13:36:29 PDT 2021
Synopsis: ELSA-2021-3057 can now be patched using Ksplice
CVEs: CVE-2021-22543 CVE-2021-22555 CVE-2021-3609
Systems running Red Hat Enterprise Linux 8 can now use Ksplice to
patch against the latest Red Hat kernel update, ELSA-2021-3057.
More information about this errata can be found at
https://linux.oracle.com/errata/ELSA-2021-3057.html
INSTALLING THE UPDATES
We recommend that all users of Ksplice Uptrack running RHEL 8 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
* CVE-2021-22543: Privilege escalation in KVM due to RO page check bypass.
The reference counts of VM_IO|VM_PFNMAP pages can be manipulated to
cause a deliberate use-after-free. This can be manipulated to cause
writes to arbitrary memory pages, allowing a malicious user with the
ability to create virtual machines to escalate their privileges.
* CVE-2021-22555: Privilege escalation in Netfilter due to out-of-bounds memory write.
A heap out-of-bounds write in netfilter could allow an attacker to gain
privileges or cause a denial-of-service.
* CVE-2021-3609: Privilege escalation in CAN BCM due to use-after-free.
A race condition in the CAN BCM implementation could lead to use-after-free
vulnerability. A local attacker could potentially use this to execute
arbitrary code.
SUPPORT
Ksplice support is available at ksplice-support_ww at oracle.com.
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