[El-errata] New Ksplice updates for UEKR5 4.14.35 on OL7 (ELSA-2021-9084)
Errata Announcements for Oracle Linux
el-errata at oss.oracle.com
Wed Mar 10 05:24:57 PST 2021
Synopsis: ELSA-2021-9084 can now be patched using Ksplice
CVEs: CVE-2020-16120 CVE-2021-3347 CVE-2021-3348
Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Security Advisory, ELSA-2021-9084.
More information about this errata can be found at
INSTALLING THE UPDATES
We recommend that all users of Ksplice Uptrack running UEKR5 4.14.35
on OL7 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-2021-3348: Use-after-free due to bad locking in Network block device.
A missing locking in Network block device could lead to use-after-free
when setting up a device. A local user could use this flaw to cause
a denial-of-service or to execute code.
* CVE-2021-3347: Privilege escalation in the Fast Userspace Mutexes.
A flaw in the Fast Userspace Mutexes implementation could lead to
a use-after-free. A local user could use this flaw to crash the system
or escalate their privileges.
* CVE-2020-16120: Read permission bypass with overlay filesystem.
A logic error in the overlay filesystem may cause the kernel to not properly
perform all required permission checks. A local attacker could use this to
bypass intended access restrictions.
Ksplice support is available at ksplice-support_ww at oracle.com.
More information about the El-errata