SB2025121315 - Ubuntu update for linux-azure
Published: December 13, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 22 secuirty vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2025-40018)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the __ip_vs_ftp_exit() and ip_vs_ftp_init() functions in net/netfilter/ipvs/ip_vs_ftp.c. A local user can escalate privileges on the system.
2) Input validation error (CVE-ID: CVE-2025-39964)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the include/crypto/if_alg.h. A local user can perform a denial of service (DoS) attack.
3) Use-after-free (CVE-ID: CVE-2025-38666)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the DEFINE_RWLOCK(), __aarp_expire(), aarp_purge() and aarp_proxy_probe_network() functions in net/appletalk/aarp.c. A local user can escalate privileges on the system.
4) Improper locking (CVE-ID: CVE-2025-37958)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the __split_huge_pmd_locked() and split_huge_pmd_locked() functions in mm/huge_memory.c. A local user can perform a denial of service (DoS) attack.
5) Use-after-free (CVE-ID: CVE-2025-21855)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the ibmvnic_xmit() and netif_stop_subqueue() functions in drivers/net/ethernet/ibm/ibmvnic.c. A local user can escalate privileges on the system.
6) Improper locking (CVE-ID: CVE-2025-21811)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the nilfs_lookup_dirty_data_buffers() function in fs/nilfs2/segment.c. A local user can perform a denial of service (DoS) attack.
7) Use-after-free (CVE-ID: CVE-2025-21791)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the include/net/l3mdev.h. A local user can escalate privileges on the system.
8) Use-after-free (CVE-ID: CVE-2025-21761)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the ovs_vport_cmd_fill_info() function in net/openvswitch/datapath.c. A local user can escalate privileges on the system.
9) Use-after-free (CVE-ID: CVE-2025-21722)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the nilfs_clear_dirty_pages() and nilfs_clear_folio_dirty() functions in fs/nilfs2/page.c. A local user can escalate privileges on the system.
10) Use-after-free (CVE-ID: CVE-2025-21715)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the dm9000_drv_remove() function in drivers/net/ethernet/davicom/dm9000.c. A local user can escalate privileges on the system.
11) Use-after-free (CVE-ID: CVE-2024-58083)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the include/linux/kvm_host.h. A local user can escalate privileges on the system.
12) NULL pointer dereference (CVE-ID: CVE-2024-53217)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the nfsd4_process_cb_update() function in fs/nfsd/nfs4callback.c. A local user can perform a denial of service (DoS) attack.
13) Improper locking (CVE-ID: CVE-2024-53112)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the ocfs2_commit_trans() function in fs/ocfs2/resize.c. A local user can perform a denial of service (DoS) attack.
14) Improper locking (CVE-ID: CVE-2024-53090)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the afs_deferred_free_worker(), afs_alloc_call(), afs_put_call(), afs_wake_up_call_waiter() and afs_wake_up_async_call() functions in fs/afs/rxrpc.c. A local user can perform a denial of service (DoS) attack.
15) Input validation error (CVE-ID: CVE-2024-50179)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the ceph_set_page_dirty() function in fs/ceph/addr.c. A local user can perform a denial of service (DoS) attack.
16) Improper locking (CVE-ID: CVE-2024-50095)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the retry_send() and timeout_sends() functions in drivers/infiniband/core/mad.c. A local user can perform a denial of service (DoS) attack.
17) Use-after-free (CVE-ID: CVE-2024-50067)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the uprobe_buffer_init(), prepare_uprobe_buffer() and __uprobe_trace_func() functions in kernel/trace/trace_uprobe.c. A local user can escalate privileges on the system.
18) Resource management error (CVE-ID: CVE-2024-49963)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to resource management error within the bcm2835_mbox_probe() function in drivers/mailbox/bcm2835-mailbox.c. A local user can perform a denial of service (DoS) attack.
19) Race condition (CVE-ID: CVE-2024-49935)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a race condition within the exit_round_robin() function in drivers/acpi/acpi_pad.c. A local user can perform a denial of service (DoS) attack.
20) Use-after-free (CVE-ID: CVE-2022-49390)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the macsec_dev_init() and macsec_free_netdev() functions in drivers/net/macsec.c. A local user can escalate privileges on the system.
21) Double free (CVE-ID: CVE-2022-49026)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a double free error within the e100_xmit_prepare() function in drivers/net/ethernet/intel/e100.c. A local user can perform a denial of service (DoS) attack.
22) NULL pointer dereference (CVE-ID: CVE-2021-47385)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the w83792d_detect_subclients() function in drivers/hwmon/w83792d.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.