[El-errata] New Ksplice updates for Oracle Enhanced RHCK 7 (ELSA-2021-3327)

Errata Announcements for Oracle Linux el-errata at oss.oracle.com
Thu Sep 9 09:16:18 PDT 2021

Synopsis: ELSA-2021-3327 can now be patched using Ksplice
CVEs: CVE-2021-22555 CVE-2021-29154 CVE-2021-29650 CVE-2021-32399

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Security Advisory, ELSA-2021-3327.
More information about this errata can be found at


We recommend that all users of Ksplice Uptrack running Oracle Enhanced
RHCK 7 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


* CVE-2021-29154: Code execution in eBPF JIT compiler.

Improper computation validation of branch displacements in eBPF JIT
compiler could lead to memory corruption. A local attacker with
the ability to insert eBPF instructions could use this flaw to cause
a denial-of-service or possibly execute arbitrary code.

* CVE-2021-32399: Code execution in the Bluetooth subsystem when removing an HCI controller.

A race condition flaw in the Bluetooth subsystem could lead to
a use-after-free of slab objects during HCI controller removal.
An local user could use this flaw to execute arbitrary code.

* CVE-2021-29650: Denial-of-service in Netfilter due to incorrect memory barrier.

Lack of a full memory barrier upon the assignment of a new table value
in the Netfilter subsystem could result in a system crash. A local user
could use this flaw to cause a denial-of-service.

* 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.


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

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