(RHSA-2021:3057) Important: kernel security, bug fix, and enhancement update

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

Security Fix(es):

• kernel: race condition in net/can/bcm.c leads to local privilege escalation (CVE-2021-3609)

• kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543)

• kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c (CVE-2021-22555)

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):

• Urgent: Missing dptf_power.ko module in RHEL8 (BZ#1968381)

• [mlx5] kdump over NFS fails: mlx5 driver gives error “Stop room 95 is bigger than the SQ size 64” (BZ#1969909)

• BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 in bluetooth hci_error_reset on intel-tigerlake-h01 (BZ#1972564)

• Update CIFS to kernel 5.10 (BZ#1973637)

• Backport “tick/nohz: Conditionally restart tick on idle exit” to RHEL 8.5 (BZ#1978710)

• Significant performance drop starting on kernel-4.18.0-277 visible on mmap benchmark (BZ#1980314)

• Inaccessible NFS server overloads clients (native_queued_spin_lock_slowpath connotation?) (BZ#1980613)

• [RHEL8.4 BUG],RialtoMLK, I915 graphic driver failed to boot with one new 120HZ panel (BZ#1981250)

• act_ct: subject to DNAT tuple collision (BZ#1982494)

Enhancement(s):

• [Lenovo 8.5 FEAT] drivers/nvme - Update to the latest upstream (BZ#1965415)