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redhatRedHatRHSA-2023:1556
HistoryApr 04, 2023 - 6:30 a.m.

(RHSA-2023:1556) Important: kernel-rt security and bug fix update

2023-04-0406:30:49
access.redhat.com
26
kernel-rt
security
bug fix
alsa
uaf
cve-2023-0266
net/ulp
use-after-free
cve-2023-0461
kasan
kcsan
ubsan
rhel-8.4
source tree

CVSS3

7.9

Attack Vector

ADJACENT

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.001

Percentile

35.5%

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):

  • ALSA: pcm: Move rwsem lock inside snd_ctl_elem_read to prevent UAF (CVE-2023-0266)

  • kernel: net/ulp: use-after-free in listening ULP sockets (CVE-2023-0461)

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 RHEL-8.4: disable KASAN, KCSAN and UBSAN for kernel-rt (BZ#2165124)

  • kernel-rt: update RT source tree to the RHEL-8.4.z16 source tree (async) (BZ#2183403)

OSVersionArchitecturePackageVersionFilename
RedHat8x86_64kernel-rt-debug-devel< 4.18.0-305.86.2.rt7.160.el8_4kernel-rt-debug-devel-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-debug-kvm< 4.18.0-305.86.2.rt7.160.el8_4kernel-rt-debug-kvm-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-debug-modules-extra< 4.18.0-305.86.2.rt7.160.el8_4kernel-rt-debug-modules-extra-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-debuginfo< 4.18.0-305.86.2.rt7.160.el8_4kernel-rt-debuginfo-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-kvm< 4.18.0-305.86.2.rt7.160.el8_4kernel-rt-kvm-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-debug-modules< 4.18.0-305.86.2.rt7.160.el8_4kernel-rt-debug-modules-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt< 4.18.0-305.86.2.rt7.160.el8_4kernel-rt-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-modules-extra< 4.18.0-305.86.2.rt7.160.el8_4kernel-rt-modules-extra-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-core< 4.18.0-305.86.2.rt7.160.el8_4kernel-rt-core-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm
RedHat8x86_64kernel-rt-debuginfo-common-x86_64< 4.18.0-305.86.2.rt7.160.el8_4kernel-rt-debuginfo-common-x86_64-4.18.0-305.86.2.rt7.160.el8_4.x86_64.rpm
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CVSS3

7.9

Attack Vector

ADJACENT

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

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Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0.001

Percentile

35.5%

JSON
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