SB2022081746 - SUSE update for the Linux Kernel
Published: August 17, 2022 Updated: October 19, 2022
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Exposure of Resource to Wrong Sphere (CVE-ID: CVE-2021-26341)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to some AMD CPUs may transiently execute beyond unconditional direct branches. A local user can gain unauthorized access to sensitive information on the system.
2) Out-of-bounds write (CVE-ID: CVE-2021-33655)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in FBIOPUT_VSCREENINFO IOCTL. A local user can trigger an out-of-bounds write error and execute arbitrary code with elevated privileges.
3) Out-of-bounds write (CVE-ID: CVE-2021-33656)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error when setting font with malicous data by ioctl cmd PIO_FONT. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.
4) Out-of-bounds read (CVE-ID: CVE-2022-1462)
The vulnerability allows a local user to perform denial of service (DoS) attack.
The vulnerability exists due to a boundary condition within the the Linux kernel’s TeleTYpe subsystem caused by a race condition when using ioctls TIOCSPTLCK and TIOCGPTPEER and TIOCSTI and TCXONC with leakage of memory file. A local user can trigger an out-of-bounds read error and crash the system or read random kernel memory.
Remediation
Install update from vendor's website.