SB2022052605 - Ubuntu update for linux

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) 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.

2) 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.

3) Incorrect default permissions (CVE-ID: CVE-2022-30594)

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

The vulnerability exists due to mishandling seccomp permissions. A local user can bypass intended restrictions on setting the PT_SUSPEND_SECCOMP flag and escalate privileges on the system.

Remediation

Install update from vendor's website.

References

• https://ubuntu.com/security/notices/USN-5442-1