SB2022101508 - SUSE update for the Linux Kernel

Description

This security bulletin contains information about 9 secuirty vulnerabilities.

1) NULL pointer dereference (CVE-ID: CVE-2022-1263)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to kvm implementation in the Linux kernel does not handle releasing a virtual cpu properly. A local user can pass specially crafted data and perform a denial of service (DoS) attack.

2) Use-after-free (CVE-ID: CVE-2022-2586)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the the netfilter subsystem implementation in Linux kernel when preventing one nft object from referencing an nft set in another nft table. A local user can trigger a use-after-free error and execute arbitrary code on the system with elevated privileges.

3) NULL pointer dereference (CVE-ID: CVE-2022-3202)

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 diFree in fs/jfs/inode.c in Journaled File System (JFS) in the Linux kernel. A local user can perform a denial of service (DoS) attack.

4) Use-after-free (CVE-ID: CVE-2022-3239)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the Linux kernel video4linux driver in the way user triggers em28xx_usb_probe() for the Empia 28xx based TV cards. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

5) NULL pointer dereference (CVE-ID: CVE-2022-3303)

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 sound subsystem due to improper locking when handling the SNDCTL_DSP_SYNC ioctl. A privileged local user can trigger a NULL pointer dereference error and perform a denial of service (DoS) attack.

6) 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.

7) Use-after-free (CVE-ID: CVE-2022-41218)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the dvb_demux_open() and dvb_dmxdev_release() function in drivers/media/dvb-core/dmxdev.c in Linux kernel. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

8) Race condition (CVE-ID: CVE-2022-41848)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a race condition in the drivers/char/pcmcia/synclink_cs.c in the Linux kernel. An attacker with physical proximity to the affected system can remove a PCMCIA device while calling ioctl, cause a race condition between mgslpc_ioctl and mgslpc_detach and perform a denial of service (DoS) attack.

9) Race condition (CVE-ID: CVE-2022-41849)

The vulnerability allows an attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a race condition in the drivers/video/fbdev/smscufx.c in the Linux kernel. An attacker with physical proximity to the system can remove the USB device while calling open(), cause a race condition between the ufx_ops_open and ufx_usb_disconnect and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://www.suse.com/support/update/announcement/2022/suse-su-20223585-1/