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almalinuxAlmaLinuxALSA-2023:1584
HistoryApr 04, 2023 - 12:00 a.m.

Important: kernel-rt security and bug fix update

2023-04-0400:00:00
errata.almalinux.org
9
real time kernel
security fix
bug fix
high determinism systems
cve
uaf
privileges escalation
soft lockup
tcp mirred egress
almalinux 8.7.z3 kernel.

7.9 High

CVSS3

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

0.001 Low

EPSS

Percentile

41.2%

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: stack overflow in do_proc_dointvec and proc_skip_spaces (CVE-2022-4378)
  • ALSA: pcm: Move rwsem lock inside snd_ctl_elem_read to prevent UAF (CVE-2023-0266)
  • kernel: FUSE filesystem low-privileged user privileges escalation (CVE-2023-0386)
  • kernel: net: CPU soft lockup in TC mirred egress-to-ingress action (CVE-2022-4269)

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):

  • Lazy irq_work does not raise softirq on PREEMPT_RT [almalinux-8] (BZ#2172163)
  • The latest AlmaLinux 8.7.z3 kernel changes need to be merged into the RT source tree to keep source parity between the two kernels. (BZ#2172278)

7.9 High

CVSS3

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

0.001 Low

EPSS

Percentile

41.2%