SB2023031051 - openEuler 22.03 LTS SP1 update for kernel

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Use-after-free (CVE-ID: CVE-2023-0240)

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

The vulnerability exists due to a use-after-free error within the io_uring's implementation in io_prep_async_work function. A local authenticated user can trigger a use-after-free error and escalate privileges on the system.

2) Divide by zero (CVE-ID: CVE-2023-0615)

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

A memory leak flaw and potential divide by 0 and Integer overflow was found in the Linux kernel V4L2 and vivid test code functionality. This issue occurs when a user triggers ioctls, such as VIDIOC_S_DV_TIMINGS ioctl. This could allow a local user to crash the system if vivid test code enabled.

3) Security features bypass (CVE-ID: CVE-2023-0045)

The vulnerability allows a local user to bypass implemented security restrictions.

The vulnerability exists due to Linux kernel does not correctly mitigate SMT attacks. A local user can bypass Spectre-BTI user space mitigations and gain access to sensitive information.

4) Use-after-free (CVE-ID: CVE-2023-23586)

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to a use-after-free error in the io_uring subsystem. A local user can gain access to sensitive information.

Remediation

Install update from vendor's website.

References

• https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2023-1157