SB2023101060 - Red Hat Enterprise Linux 8 update for kernel
Published: October 10, 2023
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) NULL pointer dereference (CVE-ID: CVE-2023-1095)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in the nf_tables_updtable() function within the netfilter subsystem. A local user can perform a denial of service (DoS) attack.
2) Information exposure through microarchitectural state after transient execution (CVE-ID: CVE-2023-1637)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due speculative execution behavior in the Linux kernel X86 CPU Power management options functionality. A local user can gain access to sensitive information.
3) 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.
4) Use-after-free (CVE-ID: CVE-2023-3776)
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's net/sched: cls_fw component. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.
5) Use-after-free (CVE-ID: CVE-2023-4128)
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.
Remediation
Install update from vendor's website.