SB2022051833 - Ubuntu update for linux
Published: May 18, 2022 Updated: June 2, 2022
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 secuirty vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2020-27820)
The vulnerability allows a local user to execute arbitrary code with elevated privileges.
The vulnerability exists due to a use-after-free error in nouveau's postclose() handler. A local user can send specially crafted data to the system and execute arbitrary code with elevated privileges.
2) Security features bypass (CVE-ID: CVE-2021-39713)
The vulnerability allows a local application to escalate privileges on the system.
The vulnerability exists due to multiple issues in Qdisc implementation related to rcu read lock. A local application can execute arbitrary code with elevated privileges.
3) Buffer overflow (CVE-ID: CVE-2021-4157)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in the Linux kernel NFS subsystem. A remote attacker can create a specially crafted data and crash the system or escalate privileges on the system
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
4) Buffer overflow (CVE-ID: CVE-2022-26490)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the st21nfca_connectivity_event_received() function in drivers/nfc/st21nfca/se.c in Linux kernel. A local user can run a specially crafted program to trigger buffer overflow and execute arbitrary code with elevated privileges.
5) Improper Validation of Array Index (CVE-ID: CVE-2022-27223)
The vulnerability allows a remote attacker to execute arbitrary code with elevated privileges.The vulnerability exists due to improper validation of array index in drivers/usb/gadget/udc/udc-xilinx.c in the Linux kernel. A remote attacker can send specially crafted data to the system and execute arbitrary code with elevated privileges.
6) Double Free (CVE-ID: CVE-2022-28390)
The vulnerability allows a local user to execute arbitrary code with elevated privileges.
The vulnerability exists due to boundary error in ems_usb_start_xmit in drivers/net/can/usb/ems_usb.c. A local user can pass specially crafted data to the application, trigger double free error and execute arbitrary code with elevated privileges.
Remediation
Install update from vendor's website.