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redhatRedHatRHSA-2021:4646
HistoryNov 15, 2021 - 9:56 a.m.

(RHSA-2021:4646) Important: kernel-rt security and bug fix update

2021-11-1509:56:17
access.redhat.com
36

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.044 Low

EPSS

Percentile

92.3%

JSON

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

  • kernel: Insufficient validation of user-supplied sizes for the MSG_CRYPTO message type (CVE-2021-43267)

  • kernel: timer tree corruption leads to missing wakeup and system freeze (CVE-2021-20317)

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):

  • kernel-rt: update RT source tree to the RHEL-8.5.z source tree (BZ#2020036)
OSVersionArchitecturePackageVersionFilename
RedHat8x86_64kernel-rt-debug-modules< 4.18.0-348.2.1.rt7.132.el8_5kernel-rt-debug-modules-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
RedHat8x86_64kernel-rt-devel< 4.18.0-348.2.1.rt7.132.el8_5kernel-rt-devel-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
RedHat8x86_64kernel-rt-debug-devel< 4.18.0-348.2.1.rt7.132.el8_5kernel-rt-debug-devel-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
RedHat8x86_64kernel-rt-debug-kvm< 4.18.0-348.2.1.rt7.132.el8_5kernel-rt-debug-kvm-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
RedHat8x86_64kernel-rt-kvm< 4.18.0-348.2.1.rt7.132.el8_5kernel-rt-kvm-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
RedHat8x86_64kernel-rt< 4.18.0-348.2.1.rt7.132.el8_5kernel-rt-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
RedHat8x86_64kernel-rt-debuginfo-common-x86_64< 4.18.0-348.2.1.rt7.132.el8_5kernel-rt-debuginfo-common-x86_64-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
RedHat8x86_64kernel-rt-debug< 4.18.0-348.2.1.rt7.132.el8_5kernel-rt-debug-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
RedHat8x86_64kernel-rt-debug-modules-extra< 4.18.0-348.2.1.rt7.132.el8_5kernel-rt-debug-modules-extra-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
RedHat8x86_64kernel-rt-debuginfo< 4.18.0-348.2.1.rt7.132.el8_5kernel-rt-debuginfo-4.18.0-348.2.1.rt7.132.el8_5.x86_64.rpm
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9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

0.044 Low

EPSS

Percentile

92.3%

JSON
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