RHSA-2021:3522: Important: kernel security and bug fix update
The kernel packages contain the Linux kernel, the core of any Linux operating system.Security Fix(es): kernel: Use after free via PI futex state (CVE-2021-3347) kernel: out-of-bounds write in xtcompattargetfromuser() in net/netfilter/xtables.c (CVE-2021-22555) kernel: race condition for removal of the HCI controller (CVE-2021-32399) kernel: use-after-free in nttyreceivebufcommon function in drivers/tty/ntty.c (CVE-2020-8648) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Bug Fix(es): sysfs: cannot create duplicate filename '/class/mdiobus/ixgbe-8100 (BZ#1972707) [CKI kernel builds]: x86 binaries in non-x86 kernel rpms breaks systemtap [7.9.z] (BZ#1975158) SAN Switch rebooted and caused (?) OpenStack compute node to reboot (BZ#1984118)
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of RHSA-2021:3522?
The severity of RHSA-2021:3522 is categorized as important due to critical vulnerabilities in the kernel.
How do I fix RHSA-2021:3522?
To fix RHSA-2021:3522, update the kernel to version 3.10.0-1062.56.1.el7 or higher.
What vulnerabilities are addressed in RHSA-2021:3522?
RHSA-2021:3522 addresses several vulnerabilities including CVE-2021-3347 and additional issues in netfilter.
Which packages are affected by RHSA-2021:3522?
Affected packages include kernel, bpftool, kernel-debug, and several others within the Red Hat ecosystem.
Is there a specific recommendation for production systems regarding RHSA-2021:3522?
It is recommended to apply the updates for RHSA-2021:3522 promptly to mitigate the identified vulnerabilities.