RHSA-2021:4056 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.

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.

Description

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

Security Fix(es):

• kernel: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free (CVE-2020-36385)
• kernel: out-of-bounds write due to a heap buffer overflow in __hidinput_change_resolution_multipliers() of hid-input.c (CVE-2021-0512)
• kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE) (CVE-2021-3656)

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):

• [HPE 8.3 bug] No EDAC MC0 message with one-DIMM two-processor configuration under RHEL8.3 (BZ#1982182)
• mlx: devlink port function shows all zero hw_addr (BZ#1986837)
• net/sched: act_mirred: allow saving the last chain processed on xmit path (BZ#1992230)
• RHEL8.3 - System hang and / or r/o fs during SVC/v5k/v7k maintenance with ibmvfc (BZ#1993892)
• RHEL8.1 Snapshot3 - PVT:940:virt:4TB:LPM operation failed by returning HSCLA2CF, HSCL365C SRC's - Linux partition suspend timeout (-> documentation/Linux Alert through LTC bug 182549) (BZ#1993952)
• RHEL8.4 - benchTableRepDMLAsyncBarrier regresses by 34% on RHEL8.4 on POWER9 compared to RHEL8.2 (performance) (BZ#1997431)
• [panic] call trace: ice_probe+0x238/0x10f0 [ice] (BZ#1997539)
• [ice, PTP] ice: fix GPIO 1PPS signal (BZ#1997572)
• Fix locality handling in the tpm_tis driver (BZ#1998219)
• [ice, PTP]: fix Tx queue iteration for Tx timestamp enablement (BZ#2000128)
• PCI passthrough with NVidia GPU "Invalid device 0003:01:00.0 iommu_group file /sys/bus/pci/devices/0003:01:00.0/iommu_group is not a symlink" (BZ#2000602)
• [DELL 8.4 BUG] - System Hangs at Dell Logo When Boot to OS(e1000e with wrong GbE checksum) (BZ#2002335)
• RHEL8.4 - kernel: Fix hanging ioctl caused by wrong msg counter (BZ#2002635)
• kernel: get_timespec64 does not ignore padding in compat syscalls (BZ#2003569)
• [mlx5] eth0: hw csum failure (BZ#2005980)
• xlog_grant_head_wait() does not return and system hangs (BZ#2007413)
• panic while breaking a lease/delegation after user mode helper invocation (BZ#2010331)
• Lockd invalid cast to nlm_lockowner (BZ#2010820)
• [xfstests generic/388] XFS: Assertion failed: 0, file: fs/xfs/xfs_mount.c, line: 1218 (BZ#2011919)

Enhancement(s):

• [Intel 8.5 FEAT] ice: Enable PTP Support (BZ#1998220)
• [Intel 8.5 FEAT] ice: Enable GPIO/SDP Support (BZ#1998221)

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Affected Products

• Red Hat Enterprise Linux for x86_64 8 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.4 x86_64
• Red Hat Enterprise Linux Server - AUS 8.6 x86_64
• Red Hat Enterprise Linux Server - AUS 8.4 x86_64
• Red Hat Enterprise Linux for IBM z Systems 8 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.6 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.4 s390x
• Red Hat Enterprise Linux for Power, little endian 8 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.6 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.4 ppc64le
• Red Hat Virtualization Host 4 for RHEL 8 x86_64
• Red Hat Enterprise Linux Server - TUS 8.6 x86_64
• Red Hat Enterprise Linux Server - TUS 8.4 x86_64
• Red Hat Enterprise Linux for ARM 64 8 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.4 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.4 x86_64
• Red Hat CodeReady Linux Builder for x86_64 8 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian 8 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 8 aarch64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.6 aarch64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.4 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.6 ppc64le
• Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 8.6 x86_64
• Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 8.4 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 8.6 ppc64le
• Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 8.4 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 8.6 aarch64
• Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 8.4 aarch64

Fixes

• BZ - 1974319 - CVE-2020-36385 kernel: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free
• BZ - 1974491 - CVE-2021-0512 kernel: out-of-bounds write due to a heap buffer overflow in __hidinput_change_resolution_multipliers() of hid-input.c
• BZ - 1983988 - CVE-2021-3656 kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE)

CVEs

• CVE-2020-36385
• CVE-2021-0512
• CVE-2021-3656

References

• https://access.redhat.com/security/updates/classification/#important