RHSA-2021:1531 — Security Advisory

An update for kernel is now available for Red Hat Enterprise Linux 7.7 Extended Update Support.

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.

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

Security Fix(es):

• kernel: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c (CVE-2020-25211)

• kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)

• kernel: out-of-bounds read in libiscsi module (CVE-2021-27364)

• kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365)

• 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)

• kernel: iscsi: unrestricted access to sessions and handles (CVE-2021-27363)

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#1931899)

• [infiniband] Backport Request to fix Multicast Sendonly joins (BZ#1937819)

• [Azure][RHEL-7]Mellanox Patches To Prevent Kernel Hang In MLX4 (BZ#1939791)