SB2023092277 - openEuler 20.03 LTS SP3 update for kernel

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Race condition (CVE-ID: CVE-2022-45887)

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

The vulnerability exists due to a race condition in drivers/media/usb/ttusb-dec/ttusb_dec.c in Linux kernel. A local user can exploit the race and crash the kernel.

2) Division by zero (CVE-ID: CVE-2023-20588)

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

The vulnerability exists due to a divide by zero error that can return speculative data. A local user can gain access to potentially sensitive information.

3) Improper input validation (CVE-ID: CVE-2023-21400)

The vulnerability allows a local application to execute arbitrary code.

The vulnerability exists due to improper input validation within the Kernel io_uring subcomponent in Kernel components. A local application can execute arbitrary code.

4) Use-after-free (CVE-ID: CVE-2023-4921)

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

The vulnerability exists due to a use-after-free error in the qfq_dequeue() function within the the Linux kernel's net/sched: sch_qfq component. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Remediation

Install update from vendor's website.

References

• https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2023-1667