SB2022071605 - SUSE update for the Linux Kernel
Published: July 16, 2022 Updated: October 19, 2022
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 21 secuirty vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2019-19377)
The vulnerability allows a local non-authenticated attacker to execute arbitrary code.
In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image, performing some operations, and unmounting can lead to a use-after-free in btrfs_queue_work in fs/btrfs/async-thread.c.
2) Protection Mechanism Failure (CVE-ID: CVE-2020-26541)
The vulnerability allows a local user to escalate privileges on the system.
The Linux kernel through 5.8.13 does not properly enforce the Secure
Boot Forbidden Signature Database (aka dbx) protection mechanism. This
affects certs/blacklist.c and certs/system_keyring.c. A local user can escalate privileges on the system.
3) 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.
4) 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.
5) Use-after-free (CVE-ID: CVE-2022-1184)
The vulnerability allows a local user to perform a denial of service attack.
The vulnerability exists due to a use-after-free error in fs/ext4/namei.c:dx_insert_block() function in the Linux kernel’s filesystem sub-component.. A local user can trigger use-after-free and perform a denial of service attack.
6) Use-after-free (CVE-ID: CVE-2022-1679)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the ath9k_htc_wait_for_target() function in the Linux kernel’s Atheros wireless adapter driver. A local user can execute arbitrary code with elevated privileges.
7) Race condition (CVE-ID: CVE-2022-1729)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition within sys_perf_event_open() in Linux kernel. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.
8) Use-after-free (CVE-ID: CVE-2022-1974)
The vulnerability allows a local privileged user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error in the Linux kernel's NFC core functionality due to a race condition between kobject creation and delete. A local attacker with CAP_NET_ADMIN privilege can leak kernel information and escalate privileges on the system.
9) Uncaught Exception (CVE-ID: CVE-2022-1975)
The vulnerability allows a remote attacker on the local network to perform a denial of service (DoS) attack.
The vulnerability exists due to an uncaught exception error in the Linux kernel. A remote attacker on the local network can perform a denial of service (DoS) attack.
10) Information disclosure (CVE-ID: CVE-2022-20132)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to excessive data output in the USB HID component in Linux Kernel. A local user can trigger the vulnerability to gain access to potentially sensitive information.
11) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2022-20141)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to improper imposition of security restrictions in the Linux kernel's components. A local user can trigger the vulnerability to bypass security restrictions bypass and escalate privileges on the system.
12) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2022-20154)
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.
13) Improper access control (CVE-ID: CVE-2022-21499)
The vulnerability allows a local user to bypass implemented security restrictions.
The vulnerability exists due to improper access restrictions to the kernel debugger when booted in secure boot environments. A local privileged user can bypass UEFI Secure Boot restrictions.
14) 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.
15) 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.
16) Processor optimization removal or modification of security-critical code (CVE-ID: CVE-2022-29900)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a mistrained branch predictions for return instructions. A local user can execute arbitrary speculative code under certain microarchitecture-dependent conditions. The vulnerability was dubbed RETbleed.
17) Processor optimization removal or modification of security-critical code (CVE-ID: CVE-2022-29901)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to the way non-transparent sharing of branch predictor targets between contexts. A local user can exploit the vulnerability to gain access to sensitive information.
18) 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.
19) 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.
20) 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.
21) Use-after-free (CVE-ID: CVE-2022-33981)
The vulnerability allows a local user to perform denial of service attack.
The vulnerability exists due to a use-after-free error in drivers/block/floppy.c in the Linux kernel when deallocating raw_cmd in the raw_cmd_ioctl function(). A local user can trigger use-after-free and perform denial of service attack.
Remediation
Install update from vendor's website.