SB2022081744 - SUSE update for the Linux Kernel
Published: August 17, 2022 Updated: December 6, 2024
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 16 secuirty vulnerabilities.
1) Race condition (CVE-ID: CVE-2020-36557)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition between the VT_DISALLOCATE IOCTL and closing/opening of ttys. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.
2) NULL pointer dereference (CVE-ID: CVE-2020-36558)
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 Linux kernel before 5.5.7 involving a VT_RESIZEX. A local user can perform a denial of service (DoS) attack.
3) 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.
4) 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.
5) Integer overflow (CVE-ID: CVE-2022-1116)
The vulnerability allows a local user to execute code with elevated privileges.
The vulnerability exists due to integer overflow in the io_uring subsystem in the Linux kernel. A local user can trigger integer overflow, cause a denial of service or execute arbitrary code with elevated privileges.
6) 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.
7) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2022-20166)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to unspecified error in the Linux Kernel. A local user can bypass security restrictions and escalate privileges on the system.
8) Security features bypass (CVE-ID: CVE-2022-21505)
The vulnerability allows an attacker to bypass implemented security restrictions.
The vulnerability exists due to incorrect implementation of the IMA lockdown feature. If IMA appraisal is used with the "ima_appraise=log" boot param, lockdown can be defeated with kexec on any machine with Secure Boot. An attacker with physical access to device can bypass Secure Boot mechanism.
9) Use-after-free (CVE-ID: CVE-2022-2318)
The vulnerability allows a local user to perform a denial of service attack.
The vulnerability exists due to a use-after-free error caused by timer handler in net/rose/rose_timer.c of linux. A local user can exploit the vulnerability to perform a denial of service attack.
10) Information disclosure (CVE-ID: CVE-2022-26365)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to Linux Block and Network PV device frontends don't zero memory regions before sharing them with the backend. A local user can gain unauthorized access to sensitive information on the system.
11) Improper update of reference count (CVE-ID: CVE-2022-29581)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to improper update of reference count in net/sched in Linux kernel. A local user can execute arbitrary code with root privileges.
12) Use-after-free (CVE-ID: CVE-2022-32250)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free incorrect NFT_STATEFUL_EXPR in net/netfilter/nf_tables_api.c in Linux kernel. A local user with ability to create user/net namespaces can execute arbitrary code with root privileges.
13) Information disclosure (CVE-ID: CVE-2022-33740)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to Linux Block and Network PV device frontends don't zero memory regions before sharing them with the backend. A local user can gain unauthorized access to sensitive information on the system.
14) Information disclosure (CVE-ID: CVE-2022-33741)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to granularity of the grant table doesn't allow sharing less than a 4K page, leading to unrelated data residing in the same 4K page as data shared with a backend being accessible by such backend. A local user can gain unauthorized access to sensitive information on the system.
15) Information disclosure (CVE-ID: CVE-2022-33742)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to granularity of the grant table doesn't allow sharing less than a 4K page, leading to unrelated data residing in the same 4K page as data shared with a backend being accessible by such backend. A local user can gain unauthorized access to sensitive information on the system.
16) Input validation error (CVE-ID: CVE-2022-36946)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input within the nfqnl_mangle() function in net/netfilter/nfnetlink_queue.c in the Linux kernel when processing IPv6 packets. A remote attacker can send specially crafted packets to the system and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.