RHSA-2021:1071: Red Hat Security Advisory: kernel security and bug fix update

An update for kernel is now available for Red Hat Enterprise Linux 7. 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: out-of-bounds read in libiscsi module (CVE-2021-27364)
• kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365)
• 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):
• Customer testing eMMC sees and intermittent boot problem on 7.8+, was not seen on 7.3 (BZ#1918916)
• tcm loopback driver causes double-start of scsi command when work is delayed (BZ#1925652)
• [Azure][RHEL-7]Mellanox Patches To Prevent Kernel Hang In MLX4 (BZ#1925691)
• A patch from upstream c365c292d059 causes us to end up leaving rt_nr_boosted in an inconsistent state, which causes a hard lockup. (BZ#1928082)
• [RHEL7.9.z] Add fix to update snd_wl1 in bulk receiver fast path (BZ#1929804) Related CVEs:
• CVE-2021-27363: kernel: iscsi: unrestricted access to sessions and handles
• CVE-2021-27364: kernel: out-of-bounds read in libiscsi module
• CVE-2021-27365: kernel: heap buffer overflow in the iSCSI subsystem