SB20260202100 - Ubuntu update for linux
Published: February 2, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 secuirty vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2025-39993)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the display_open(), send_packet(), vfd_write(), lcd_write() and imon_disconnect() functions in drivers/media/rc/imon.c. A local user can escalate privileges on the system.
2) Use-after-free (CVE-ID: CVE-2024-56606)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the packet_create() function in net/packet/af_packet.c. A local user can escalate privileges on the system.
3) Resource management error (CVE-ID: CVE-2024-53164)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to resource management error within the choke_drop_by_idx() function in net/sched/sch_choke.c, within the cake_drop() function in net/sched/sch_cake.c. A local user can perform a denial of service (DoS) attack.
4) Resource management error (CVE-ID: CVE-2024-50195)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to resource management error within the pc_clock_settime() function in kernel/time/posix-clock.c. A local user can perform a denial of service (DoS) attack.
5) Improper locking (CVE-ID: CVE-2024-49959)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the __releases() function in fs/jbd2/checkpoint.c. A local user can perform a denial of service (DoS) attack.
6) Buffer overflow (CVE-ID: CVE-2021-47485)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to memory corruption within the qib_user_sdma_num_pages(), qib_user_sdma_free_pkt_frag(), qib_user_sdma_pin_pkt() and qib_user_sdma_queue_pkts() functions in drivers/infiniband/hw/qib/qib_user_sdma.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.