SB2023032833 - Ubuntu update for linux-oem-6.0
Published: March 28, 2023
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Improper Initialization (CVE-ID: CVE-2022-2196)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to improper initialization within nVMX in Linux kernel. A local user can perform speculative execution attacks and escalate privileges on the system.
2) Double Free (CVE-ID: CVE-2023-1032)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error when handling the IORING_OP_SOCKET operation with io_uring in Linux kernel. A local user can trigger a double free error and crash the kernel.
3) Use-after-free (CVE-ID: CVE-2023-1281)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error in Linux kernel traffic control index filter (tcindex) when the tcf_exts_exec() function is called with the destroyed tcf_ext. A local user attacker can trigger a use-after-free error and execute arbitrary code with elevated privileges.
Remediation
Install update from vendor's website.