SB2023112837 - Red Hat Enterprise Linux 8.8 Extended Update Support update for kernel

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Main Vulnerability Database SB2023112837

SB2023112837 - Red Hat Enterprise Linux 8.8 Extended Update Support update for kernel

Published: November 28, 2023

Security Bulletin ID SB2023112837
Severity
Medium
Patch available
YES
Number of vulnerabilities 13
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Medium 8% Low 92%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 13 secuirty vulnerabilities.


1) Use-after-free (CVE-ID: CVE-2023-3609)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the the Linux kernel net/sched: cls_u32 component. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.


2) Use-after-free (CVE-ID: CVE-2023-4128)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within net/sched/cls_fw.c in classifiers (cls_fw, cls_u32, and cls_route) in the Linux Kernel. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.


3) Use-after-free (CVE-ID: CVE-2023-4206)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the the cls_route component in Linux kernel packet scheduler. A local user can trigger a use-after-free error and execute arbitrary code on the system.


4) Use-after-free (CVE-ID: CVE-2023-4207)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the the cls_fw component in Linux kernel packet scheduler. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.


5) Use-after-free (CVE-ID: CVE-2023-4208)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the the cls_u32 component in Linux kernel packet scheduler. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.


6) Out-of-bounds write (CVE-ID: CVE-2023-42753)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in the netfilter subsystem in Linux kernel. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.


7) Information exposure through microarchitectural state after transient execution (CVE-ID: CVE-2022-40982)

The vulnerability allows a malicious guest to escalate privileges on the system.

The vulnerability exists due to the way data is shared between threads whereby the AVX GATHER instructions on Intel processors can forward the content of stale vector registers to dependent instructions. A malicious guest can infer data from different contexts on the same core and execute arbitrary code with elevated privileges.


8) Use-after-free (CVE-ID: CVE-2022-45884)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in drivers/media/dvb-core/dvbdev.c in Linux kernel related to dvb_register_device() function dynamically allocating fops. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.


9) Use-after-free (CVE-ID: CVE-2022-45886)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in drivers/media/dvb-core/dvb_net.c in Linux kernel. A local user can trigger a race condition and execute arbitrary code with elevated privileges.

10) Use-after-free (CVE-ID: CVE-2022-45919)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in drivers/media/dvb-core/dvb_ca_en50221.c in Linux kernel. A local user can trigger a race condition and execute arbitrary code with elevated privileges.

11) Race condition (CVE-ID: CVE-2023-4732)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a race condition caused by a BUG statement referencing pmd_t x within the pfn_swap_entry_to_page () function. A local user can exploit the race and crash the kernel.


12) Buffer overflow (CVE-ID: CVE-2023-38409)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error within the set_con2fb_map() function in drivers/video/fbdev/core/fbcon.c. A local user can trigger memory corruption and perform a denial of service (DoS) attack.


13) Use-after-free (CVE-ID: CVE-2023-1192)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the smb2_is_status_io_timeout() function in Linux kernel. A local user can set environment variable to a specific value, trigger a use-after-free error and execute arbitrary code with elevated privileges.


Remediation

Install update from vendor's website.

References