SB2022101866 - SUSE update for the Linux Kernel (Live Patch 30 for SLE 15 SP2)
Published: October 18, 2022
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 7 secuirty vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2021-39698)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error in Linux kernel. A local user can run a specially crafted program to trigger the use-after-free error and execute arbitrary code with elevated privileges.
2) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2022-39189)
The vulnerability allows a guest user to escalate privileges on the system.
The vulnerability exists due to incorrect handling of TLB flush operations in certain KVM_VCPU_PREEMPTED situations in the x86 KVM subsystem in the Linux kernel. An attacker with unprivileged access to the guest OS can escalate privileges on the guest.
3) Use-after-free (CVE-ID: CVE-2022-41222)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to a use-after-free error caused by a stale TLB in mm/mremap.c, because an rmap lock is not held during a PUD move. A local user can gain access to sensitive information.
4) Buffer overflow (CVE-ID: CVE-2022-41674)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing WLAN frames within the ieee80211_bss_info_update() function in net/mac80211/scan.c in Linux kernel. A remote attacker on the local network can send specially crafted WLAN frames to the affected system, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
5) Use-after-free (CVE-ID: CVE-2022-42719)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in the mac80211 stack in Linux kernel when parsing a multi-BSSID element. A remote attacker on the local network can send specially crafted WLAN frames to the affected system, trigger a use-after-free error and execute arbitrary code.
6) Use-after-free (CVE-ID: CVE-2022-42720)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in the mac80211 stack in Linux kernel when parsing a multi-BSS element. A remote attacker on the local network can send specially crafted WLAN frames to the affected system, trigger a use-after-free error and execute arbitrary code.7) Buffer overflow (CVE-ID: CVE-2022-42721)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a list management error in the mac80211 stack in the Linux kernel when handling BSS. A remote attacker on the local network can send specially crafted WLAN frames to the system, trigger linked list corruption and execute arbitrary code.
Remediation
Install update from vendor's website.