SB2022062939 - openEuler update for kernel

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Use-after-free (CVE-ID: CVE-2022-1048)

The vulnerability allows a local user to execute arbitrary code with elevated privileges.

The vulnerability exists due to a use-after-free error in the Linux kernel’s sound subsystem in the way a user triggers concurrent calls of PCM hw_params. A local user can execute arbitrary code with elevated privileges and perform a denial-of-service attack.

2) Out-of-bounds write (CVE-ID: CVE-2022-1158)

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

The vulnerability exists due the KVM implementation in Linux kernel does not properly perform guest page table updates in some situations. A remote user on the guest operating system can trigger memory corruption and perform a denial of service attack against the host OS.

3) 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.

Remediation

Install update from vendor's website.

References

• https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1727