SB2023082853 - Ubuntu update for linux
Published: August 28, 2023
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 secuirty vulnerabilities.
1) Improper locking (CVE-ID: CVE-2023-2269)
The vulnerability allows a local user to perform a denial of service attack (DoS).
The vulnerability exists due to double-locking error in table_clear in drivers/md/dm-ioctl.c. A local user can perform a denial of service (DoS) attack.
2) Use-after-free (CVE-ID: CVE-2023-2985)
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 hfsplus_put_super() function in fs/hfsplus/super.c. A local user can trigger a use-after-free error and crash the kernel.
3) Deadlock (CVE-ID: CVE-2023-31084)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a deadlock in drivers/media/dvb-core/dvb_frontend.c when a task is in !TASK_RUNNING. A local user can trigger a deadlock and crash the kernel.
4) Use-after-free (CVE-ID: CVE-2023-3567)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the vc_screen() function in vcs_read in drivers/tty/vt/vc_screen.c. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.
5) Out-of-bounds write (CVE-ID: CVE-2023-3611)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in the qfq_change_agg() function in net/sched/sch_qfq.c within the Linux kernel net/sched: sch_qfq component. A local user trigger an out-of-bounds write and execute arbitrary code on the target system.
6) Use-after-free (CVE-ID: CVE-2023-3776)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the the Linux kernel's net/sched: cls_fw 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.