SB2022111722 - Ubuntu update for linux
Published: November 17, 2022
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 8 secuirty vulnerabilities.
1) Out-of-bounds write (CVE-ID: CVE-2022-20422)
The vulnerability allows a local application to escalate privileges on the system.
The vulnerability exists due to a boundary error within emulation_proc_handler() in armv8 emulation in arch/arm64/kernel/armv8_deprecated.c. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.
2) Out-of-bounds read (CVE-ID: CVE-2022-2905)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in the Linux kernel BPF subsystem. A local user can call the bpf_tail_call() function with a key larger than the max_entries of the map, trigger an out-of-bounds read and read parts of kernel memory.
3) Use-after-free (CVE-ID: CVE-2022-2978)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the Linux kernel NILFS file system. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.
4) Race condition (CVE-ID: CVE-2022-3028)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition in the Linux kernel's IP framework for transforming packets (XFRM subsystem) when multiple calls to xfrm_probe_algs occurred simultaneously. A local user can exploit the race and escalate privileges on the system.
5) Use-after-free (CVE-ID: CVE-2022-3625)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the devlink_param_set() and devlink_param_get() function in net/core/devlink.c in IPsec component of Linux kernel. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.
6) Use-after-free (CVE-ID: CVE-2022-3635)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a use-after-free error within the drivers/atm/idt77252.c in IPsec component of Linux kernel. A local user can trigger a use-after-free error and crash the kernel.
7) Out-of-bounds read (CVE-ID: CVE-2022-39190)
The vulnerability allows a local user to perform a denial of service attack.
The vulnerability exists due to an out-of-bounds read error within the net/netfilter/nf_tables_api.c in the Linux kernel. A local user can bind to an already bound chain and crash the kernel.
8) Improper access control (CVE-ID: CVE-2022-40768)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to improper access restrictions in the drivers/scsi/stex.c in the Linux kernel. A local user can obtain sensitive information from kernel memory because stex_queuecommand_lck lacks a memset for the PASSTHRU_CMD case.
Remediation
Install update from vendor's website.