Explore top 10 tips to secure your open-source projects now. Read More

×
Alerts This Week
Warning Icon 1 510
Alerts This Week
Warning Icon 1 510

Red Hat Enterprise Linux 7.7: RHSA-2021-3987-01 Important Kernel Update

red hat
Calendar Grey October 26, 2021
Dist Redhat Esm H88
Critical kernel vulnerability and patch release provided for Red Hat Enterprise Linux version 7.7 and relevant platforms.
An update for kernel is now available for Red Hat Enterprise Linux 7.7 Advanced Update Support, Red Hat Enterprise Linux 7.7 Telco Extended Update Support, and Red Hat Enterprise L...

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: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks (CVE-2021-22543)
* kernel: powerpc: KVM guest OS users can cause host OS memory corruption (CVE-2021-37576)
* kernel: use-after-free in show_numa_stats function (CVE-2019-20934)
* kernel: SVM nested virtualization issue in KVM (AVIC support) (CVE-2021-3653)
* 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):
* A race between i40e_ndo_set_vf_mac() and i40e_vsi_clear() in the i40e driver causes a use after free condition of the kmalloc-4096 slab cache. (BZ#1980333)

Topics%20covered

Topics Covered

security advisory kernel update bug fix security fix Red Hat Enterprise Linux important kernel vulnerabilities

References

https://access.redhat.com/security/cve/CVE-2019-20934 https://access.redhat.com/security/cve/CVE-2020-36385 https://access.redhat.com/security/cve/CVE-2021-3653 https://access.redhat.com/security/cve/CVE-2021-3656 https://access.redhat.com/security/cve/CVE-2021-22543 https://access.redhat.com/security/cve/CVE-2021-37576 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Server AUS (v. 7.7):
Source: kernel-3.10.0-1062.59.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-1062.59.1.el7.noarch.rpm kernel-doc-3.10.0-1062.59.1.el7.noarch.rpm
x86_64: bpftool-3.10.0-1062.59.1.el7.x86_64.rpm bpftool-debuginfo-3.10.0-1062.59.1.el7.x86_64.rpm kernel-3.10.0-1062.59.1.el7.x86_64.rpm kernel-debug-3.10.0-1062.59.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1062.59.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-1062.59.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-1062.59.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1062.59.1.el7.x86_64.rpm kernel-devel-3.10.0-1062.59.1.el7.x86_64.rpm kernel-headers-3.10.0-1062.59.1.el7.x86_64.rpm kernel-tools-3.10.0-1062.59.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1062.59.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-1062.59.1.el7.x86_64.rpm perf-3.10.0-1062.59.1.el7.x86_64.rpm perf-debuginfo-3.10.0-1062.59.1.el7.x86_64.rpm python-perf-3.10.0-1062.59.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1062.59.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server E4S (v. 7.7):
Source: kernel-3.10.0-1062.59.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-1062.59.1.el7.noarch.rpm kernel-doc-3.10.0-1062.59.1.el7.noarch.rpm
ppc64le: bpftool-3.10.0-1062.59.1.el7.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:3987-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3987
Issue date: 2021-10-26

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.7Advanced Update Support, Red Hat Enterprise Linux 7.7 Telco Extended UpdateSupport, and Red Hat Enterprise Linux 7.7 Update Services for SAPSolutions.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 kernel update bug fix security fix Red Hat Enterprise Linux important kernel vulnerabilities

Relevant Releases Architectures

Red Hat Enterprise Linux Server AUS (v. 7.7) - noarch, x86_64

Red Hat Enterprise Linux Server E4S (v. 7.7) - noarch, ppc64le, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 7.7) - x86_64

Red Hat Enterprise Linux Server Optional E4S (v. 7.6) - ppc64le, x86_64

Red Hat Enterprise Linux Server Optional TUS (v. 7.7) - x86_64

Red Hat Enterprise Linux Server TUS (v. 7.7) - noarch, x86_64

Bugs Fixed

1902788 - CVE-2019-20934 kernel: use-after-free in show_numa_stats function

1965461 - CVE-2021-22543 kernel: Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks

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

1983686 - CVE-2021-3653 kernel: SVM nested virtualization issue in KVM (AVIC support)

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

1986506 - CVE-2021-37576 kernel: powerpc: KVM guest OS users can cause host OS memory corruption

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.