RHSA-2021:0760: Red Hat Security Advisory: kernel security and bug fix update

An update for kernel is now available for Red Hat Enterprise Linux 7.4 Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update Support, and Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Moderate. 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: umask not applied on filesystem without ACL support (CVE-2020-24394)
• kernel: TOCTOU mismatch in the NFS client code (CVE-2020-25212) 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):
• Security patch for CVE-2020-25212 breaks directory listings via ‘ls’ on NFS V4.2 shares mounted with selinux enabled labels (BZ#1919141) Related CVEs:
• CVE-2020-24394: kernel: umask not applied on filesystem without ACL support
• CVE-2020-25212: kernel: TOCTOU mismatch in the NFS client code