SB2025103047 - Ubuntu update for linux-kvm
Published: October 30, 2025 Updated: February 6, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 18 secuirty vulnerabilities.
1) Input validation error (CVE-ID: CVE-2025-40300)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the vcpu_enter_guest() function in arch/x86/kvm/x86.c. A local user can perform a denial of service (DoS) attack.
2) Use-after-free (CVE-ID: CVE-2025-38618)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the __vsock_bind_connectible() function in net/vmw_vsock/af_vsock.c. A local user can escalate privileges on the system.
3) Improper locking (CVE-ID: CVE-2025-38617)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the packet_set_ring() function in net/packet/af_packet.c. A local user can perform a denial of service (DoS) attack.
4) Use-after-free (CVE-ID: CVE-2025-38477)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the qfq_change_class(), qfq_delete_class(), qfq_dump_class() and qfq_dump_class_stats() functions in net/sched/sch_qfq.c. A local user can escalate privileges on the system.
5) Race condition (CVE-ID: CVE-2025-38352)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition within the run_posix_cpu_timers() function in kernel/time/posix-cpu-timers.c. A local user can escalate privileges on the system.
Note, the vulnerability is being actively exploited in the wild against Android devices.
6) Use-after-free (CVE-ID: CVE-2025-37838)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the ssip_reset() function in drivers/hsi/clients/ssi_protocol.c. A local user can escalate privileges on the system.
7) Use-after-free (CVE-ID: CVE-2025-37785)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the __ext4_check_dir_entry() function in fs/ext4/dir.c. A local user can escalate privileges on the system.
8) Use-after-free (CVE-ID: CVE-2025-21796)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the posix_acl_release() function in fs/nfsd/nfs3acl.c, within the posix_acl_release() function in fs/nfsd/nfs2acl.c. A local user can escalate privileges on the system.
9) Use-after-free (CVE-ID: CVE-2024-56767)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the at_xdmac_prep_dma_memset() function in drivers/dma/at_xdmac.c. A local user can escalate privileges on the system.
10) Out-of-bounds read (CVE-ID: CVE-2024-53150)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to an out-of-bounds read error within the DESC_LENGTH_CHECK(), validate_clock_source() and validate_clock_selector() functions in sound/usb/clock.c. A local user can perform a denial of service (DoS) attack.
11) Race condition within a thread (CVE-ID: CVE-2024-53124)
The vulnerability allows a local user to corrupt data.
The vulnerability exists due to a data race within the tcp_v6_do_rcv() function in net/ipv6/tcp_ipv6.c, within the dccp_v6_do_rcv() function in net/dccp/ipv6.c. A local user can corrupt data.
12) Input validation error (CVE-ID: CVE-2024-50299)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the sctp_sf_ootb() function in net/sctp/sm_statefuns.c. A local user can perform a denial of service (DoS) attack.
13) Improper locking (CVE-ID: CVE-2024-50006)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the ext4_ind_migrate() function in fs/ext4/migrate.c. A local user can perform a denial of service (DoS) attack.
14) Use-after-free (CVE-ID: CVE-2024-49924)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the pxafb_remove() function in drivers/video/fbdev/pxafb.c. A local user can escalate privileges on the system.
15) Memory leak (CVE-ID: CVE-2024-41006)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the nr_heartbeat_expiry() function in net/netrom/nr_timer.c. A local user can perform a denial of service (DoS) attack.
16) Information disclosure (CVE-ID: CVE-2024-35849)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to information disclosure within the init_data_container() function in fs/btrfs/backref.c. A local user can gain access to sensitive information.
17) NULL pointer dereference (CVE-ID: CVE-2023-52650)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the tegra_dsi_ganged_probe() function in drivers/gpu/drm/tegra/dsi.c. A local user can perform a denial of service (DoS) attack.
18) NULL pointer dereference (CVE-ID: CVE-2023-52574)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in drivers/net/team/team.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.