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redhatRedHatRHSA-2023:3462
HistoryJun 06, 2023 - 7:52 a.m.

(RHSA-2023:3462) Important: kernel-rt security and bug fix update

2023-06-0607:52:09
access.redhat.com
25
kernel-rt packages
security fix
bug fix
real time linux kernel
use-after-free
rhel-8.4.z17
workqueue fix
determinism requirements

CVSS3

8.8

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.001

Percentile

51.3%

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: use-after-free in l2cap_connect and l2cap_le_connect_req in net/bluetooth/l2cap_core.c (CVE-2022-42896)

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-8.4.z17 source tree (BZ#2185910)

  • RHEL-8.7 kernel-rt: INFO: task deadline_test:2526 blocked for more than 600 seconds. (BZ#2188652)

  • Crash: kernel BUG at kernel/locking/rtmutex.c:1338! (BZ#2188725)

  • kernel-rt: workqueue: Fix divergence from stock 8.4 (BZ#2209152)

OSVersionArchitecturePackageVersionFilename
RedHat8x86_64kernel-rt-debuginfo-common-x86_64< 4.18.0-305.91.1.rt7.166.el8_4kernel-rt-debuginfo-common-x86_64-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-devel< 4.18.0-305.91.1.rt7.166.el8_4kernel-rt-devel-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-debug-devel< 4.18.0-305.91.1.rt7.166.el8_4kernel-rt-debug-devel-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-kvm< 4.18.0-305.91.1.rt7.166.el8_4kernel-rt-kvm-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-debug< 4.18.0-305.91.1.rt7.166.el8_4kernel-rt-debug-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-modules-extra< 4.18.0-305.91.1.rt7.166.el8_4kernel-rt-modules-extra-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-debug-debuginfo< 4.18.0-305.91.1.rt7.166.el8_4kernel-rt-debug-debuginfo-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-debug-core< 4.18.0-305.91.1.rt7.166.el8_4kernel-rt-debug-core-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-modules< 4.18.0-305.91.1.rt7.166.el8_4kernel-rt-modules-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-debug-kvm< 4.18.0-305.91.1.rt7.166.el8_4kernel-rt-debug-kvm-4.18.0-305.91.1.rt7.166.el8_4.x86_64.rpm
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CVSS3

8.8

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.001

Percentile

51.3%

JSON
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