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redhatRedHatRHSA-2023:4255
HistoryJul 25, 2023 - 7:33 a.m.

(RHSA-2023:4255) Important: kernel-rt security and bug fix update

2023-07-2507:33:05
access.redhat.com
12
kernel-rt
real time linux kernel
privilege escalation
use-after-free
nf_tables
cvss score
rhel-8.4z18 batch

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7.6 High

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

5.1%

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: tcindex: use-after-free vulnerability in traffic control index filter allows privilege escalation (CVE-2023-1281)

  • kernel: netfilter: use-after-free in nf_tables when processing batch requests can lead to privilege escalation (CVE-2023-32233)

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 latest RHEL-8.4z18 Batch (BZ#2209986)
OSVersionArchitecturePackageVersionFilename
RedHat8x86_64kernel-rt-debuginfo-common-x86_64< 4.18.0-305.97.1.rt7.172.el8_4kernel-rt-debuginfo-common-x86_64-4.18.0-305.97.1.rt7.172.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-kvm< 4.18.0-305.97.1.rt7.172.el8_4kernel-rt-kvm-4.18.0-305.97.1.rt7.172.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-debuginfo< 4.18.0-305.97.1.rt7.172.el8_4kernel-rt-debuginfo-4.18.0-305.97.1.rt7.172.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-debug-kvm< 4.18.0-305.97.1.rt7.172.el8_4kernel-rt-debug-kvm-4.18.0-305.97.1.rt7.172.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-debug-modules< 4.18.0-305.97.1.rt7.172.el8_4kernel-rt-debug-modules-4.18.0-305.97.1.rt7.172.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-debug-modules-extra< 4.18.0-305.97.1.rt7.172.el8_4kernel-rt-debug-modules-extra-4.18.0-305.97.1.rt7.172.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-debug-core< 4.18.0-305.97.1.rt7.172.el8_4kernel-rt-debug-core-4.18.0-305.97.1.rt7.172.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-modules< 4.18.0-305.97.1.rt7.172.el8_4kernel-rt-modules-4.18.0-305.97.1.rt7.172.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-debug-debuginfo< 4.18.0-305.97.1.rt7.172.el8_4kernel-rt-debug-debuginfo-4.18.0-305.97.1.rt7.172.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-debug< 4.18.0-305.97.1.rt7.172.el8_4kernel-rt-debug-4.18.0-305.97.1.rt7.172.el8_4.x86_64.rpm
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7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7.6 High

AI Score

Confidence

Low

0.0004 Low

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Percentile

5.1%

JSON
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