(RHSA-2021:2570) 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 in net/bluetooth/hci_event.c when destroying an hci_chan (CVE-2021-33034)

• kernel: security bypass in certs/blacklist.c and certs/system_keyring.c (CVE-2020-26541)

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):

• [ESXi][RHEL-8] VMXNET3 v4 causes invalid checksums of inner packets of VXLAN tunnel (BZ#1960702)

• fnic crash from invalid request pointer (BZ#1961705)

• GFS2: Failed FS thaw call makes the entire snapshot failed. (BZ#1961849)

• dm writecache: fix performance degradation in ssd mode (BZ#1962241)

• Kernel BUG with act_ct and IP fragments (BZ#1963940)

• core: backports from upstream (BZ#1963952)

• Hibernate resume on RHEL fails in Amazon EC2 C5.18xlarge instance (BZ#1964930)

• [SanityOnly] panic caused by i40e_msix_clean_rings (BZ#1964962)

• tc reclassification limit is too low for OVN (BZ#1965148)

• tc action ct nat src addr does not work while used with ct nat dst addr together (BZ#1965150)

• CNB: Rebase/update TC subsystem for RHEL 8.5 (BZ#1965457)

• sctp: crash due to use after free of sctp_transport structure (BZ#1965632)