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redhatRedHatRHSA-2021:0184
HistoryJan 19, 2021 - 10:21 a.m.

(RHSA-2021:0184) Important: kernel security and bug fix update

2021-01-1910:21:51
access.redhat.com
112
rhsa-2021-0184
kernel packages
linux kernel
buffer overflow
information exposure
data corruption
memory corruption
hang
crash dump
ip forwarding
netvsc

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:N/A:N

CVSS3

6

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

EPSS

0.004

Percentile

74.9%

JSON

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

Security Fix(es):

  • kernel: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c (CVE-2020-25211)

  • kernel: information exposure in drivers/char/random.c and kernel/time/timer.c (CVE-2020-16166)

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):

  • RHEL8.1 - net/smc: fix silent data corruption in SMC (BZ#1882242)

  • RHEL8.1 - Random memory corruption may occur due to incorrect tlbflush (BZ#1899210)

  • RHEL8.3 Beta - RHEL8.3 hangs on dbginfo.sh execution, crash dump generated (mm-) (BZ#1903021)

  • [Azure][RHEL8] IP forwarding issue in netvsc (BZ#1904327)

OSVersionArchitecturePackageVersionFilename
RedHat8x86_64perf< 4.18.0-147.38.1.el8_1perf-4.18.0-147.38.1.el8_1.x86_64.rpm
RedHat8aarch64kernel-modules-extra< 4.18.0-147.38.1.el8_1kernel-modules-extra-4.18.0-147.38.1.el8_1.aarch64.rpm
RedHat8x86_64kernel-debug-debuginfo< 4.18.0-147.38.1.el8_1kernel-debug-debuginfo-4.18.0-147.38.1.el8_1.x86_64.rpm
RedHat8s390xkernel-debug-core< 4.18.0-147.38.1.el8_1kernel-debug-core-4.18.0-147.38.1.el8_1.s390x.rpm
RedHat8aarch64kernel-modules< 4.18.0-147.38.1.el8_1kernel-modules-4.18.0-147.38.1.el8_1.aarch64.rpm
RedHat8s390xkernel-debug-debuginfo< 4.18.0-147.38.1.el8_1kernel-debug-debuginfo-4.18.0-147.38.1.el8_1.s390x.rpm
RedHat8s390xkernel-debuginfo< 4.18.0-147.38.1.el8_1kernel-debuginfo-4.18.0-147.38.1.el8_1.s390x.rpm
RedHat8aarch64kernel-headers< 4.18.0-147.38.1.el8_1kernel-headers-4.18.0-147.38.1.el8_1.aarch64.rpm
RedHat8s390xkernel-debug< 4.18.0-147.38.1.el8_1kernel-debug-4.18.0-147.38.1.el8_1.s390x.rpm
RedHat8s390xpython3-perf-debuginfo< 4.18.0-147.38.1.el8_1python3-perf-debuginfo-4.18.0-147.38.1.el8_1.s390x.rpm
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CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:N/A:N

CVSS3

6

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

EPSS

0.004

Percentile

74.9%

JSON
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