RHSA-2021:2355 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.6 Advanced Update Support, Red Hat Enterprise Linux 7.6 Telco Extended Update Support, and Red Hat Enterprise Linux 7.6 Update Services for SAP Solutions.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: Integer overflow in Intel(R) Graphics Drivers (CVE-2020-12362)
• kernel: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c (CVE-2020-25211)
• kernel: malicious USB devices can lead to multiple out-of-bounds write (CVE-2019-19532)
• kernel: ICMP rate limiting can be used for DNS poisoning attack (CVE-2020-25705)

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):

• memcg: mem_cgroup_idr can be updated in an uncoordinated manner which can lead to corruption (BZ#1931901)
• Kernel experiences panic in update_group_power() due to division error even with Bug 1701115 fix (BZ#1961624)

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Affected Products

• Red Hat Enterprise Linux Server - AUS 7.6 x86_64
• Red Hat Enterprise Linux Server - TUS 7.6 x86_64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 7.6 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.6 x86_64

Fixes

• BZ - 1781821 - CVE-2019-19532 kernel: malicious USB devices can lead to multiple out-of-bounds write
• BZ - 1877571 - CVE-2020-25211 kernel: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c
• BZ - 1894579 - CVE-2020-25705 kernel: ICMP rate limiting can be used for DNS poisoning attack
• BZ - 1930246 - CVE-2020-12362 kernel: Integer overflow in Intel(R) Graphics Drivers

CVEs

• CVE-2019-19532
• CVE-2020-12362
• CVE-2020-25211
• CVE-2020-25705

References

• https://access.redhat.com/security/updates/classification/#important