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Red Hat Enterprise Linux 8 RHSA-2021-4056-01 Important Kernel Security Fix

red hat
Calendar Grey November 2, 2021
Dist Redhat Esm H88
Ubuntu issues a critical kernel patch that tackles vulnerabilities and resolves bugs affecting its 20.04 LTS systems.
An update for kernel is now available for Red Hat Enterprise Linux 8

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.

Summary

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)

Topics%20covered

Topics Covered

security advisory security issue buffer overflow Red Hat Enterprise Linux important kernel fix use-after-free

References

https://access.redhat.com/security/cve/CVE-2020-36385 https://access.redhat.com/security/cve/CVE-2021-0512 https://access.redhat.com/security/cve/CVE-2021-3656 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux BaseOS (v. 8):
Source: kernel-4.18.0-305.25.1.el8_4.src.rpm
aarch64: bpftool-4.18.0-305.25.1.el8_4.aarch64.rpm bpftool-debuginfo-4.18.0-305.25.1.el8_4.aarch64.rpm kernel-4.18.0-305.25.1.el8_4.aarch64.rpm kernel-core-4.18.0-305.25.1.el8_4.aarch64.rpm kernel-cross-headers-4.18.0-305.25.1.el8_4.aarch64.rpm kernel-debug-4.18.0-305.25.1.el8_4.aarch64.rpm kernel-debug-core-4.18.0-305.25.1.el8_4.aarch64.rpm kernel-debug-debuginfo-4.18.0-305.25.1.el8_4.aarch64.rpm kernel-debug-devel-4.18.0-305.25.1.el8_4.aarch64.rpm kernel-debug-modules-4.18.0-305.25.1.el8_4.aarch64.rpm kernel-debug-modules-extra-4.18.0-305.25.1.el8_4.aarch64.rpm kernel-debuginfo-4.18.0-305.25.1.el8_4.aarch64.rpm kernel-debuginfo-common-aarch64-4.18.0-305.25.1.el8_4.aarch64.rpm kernel-devel-4.18.0-305.25.1.el8_4.aarch64.rpm kernel-headers-4.18.0-305.25.1.el8_4.aarch64.rpm kernel-modules-4.18.0-305.25.1.el8_4.aarch64.rpm kernel-modules-extra-4.18.0-305.25.1.el8_4.aarch64.rpm kernel-tools-4.18.0-305.25.1.el8_4.aarch64.rpm kernel-tools-debuginfo-4.18.0-305.25.1.el8_4.aarch64.rpm kernel-tools-libs-4.18.0-305.25.1.el8_4.aarch64.rpm perf-4.18.0-305.25.1.el8_4.aarch64.rpm perf-debuginfo-4.18.0-305.25.1.el8_4.aarch64.rpm python3-perf-4.18.0-305.25.1.el8_4.aarch64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:4056-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4056
Issue date: 2021-11-02

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 impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security issue buffer overflow Red Hat Enterprise Linux important kernel fix use-after-free

Relevant Releases Architectures

Red Hat CodeReady Linux Builder (v. 8) - aarch64, ppc64le, x86_64

Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

1974319 - CVE-2020-36385 kernel: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free

1974491 - CVE-2021-0512 kernel: out-of-bounds write due to a heap buffer overflow in __hidinput_change_resolution_multipliers() of hid-input.c

1983988 - CVE-2021-3656 kernel: SVM nested virtualization issue in KVM (VMLOAD/VMSAVE)

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