vulnerability

Ubuntu: (Multiple Advisories) (CVE-2025-38056): Linux kernel vulnerabilities

Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
Jun 18, 2025
Added
Jun 26, 2025
Modified
Nov 19, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

ASoC: SOF: Intel: hda: Fix UAF when reloading module

hda_generic_machine_select() appends -idisp to the tplg filename by
allocating a new string with devm_kasprintf(), then stores the string
right back into the global variable snd_soc_acpi_intel_hda_machines.
When the module is unloaded, this memory is freed, resulting in a global
variable pointing to freed memory. Reloading the module then triggers
a use-after-free:

BUG: KFENCE: use-after-free read in string+0x48/0xe0

Use-after-free read at 0x00000000967e0109 (in kfence-#99):
string+0x48/0xe0
vsnprintf+0x329/0x6e0
devm_kvasprintf+0x54/0xb0
devm_kasprintf+0x58/0x80
hda_machine_select.cold+0x198/0x17a2 [snd_sof_intel_hda_generic]
sof_probe_work+0x7f/0x600 [snd_sof]
process_one_work+0x17b/0x330
worker_thread+0x2ce/0x3f0
kthread+0xcf/0x100
ret_from_fork+0x31/0x50
ret_from_fork_asm+0x1a/0x30

kfence-#99: 0x00000000198a940f-0x00000000ace47d9d, size=64, cache=kmalloc-64

allocated by task 333 on cpu 8 at 17.798069s (130.453553s ago):
devm_kmalloc+0x52/0x120
devm_kvasprintf+0x66/0xb0
devm_kasprintf+0x58/0x80
hda_machine_select.cold+0x198/0x17a2 [snd_sof_intel_hda_generic]
sof_probe_work+0x7f/0x600 [snd_sof]
process_one_work+0x17b/0x330
worker_thread+0x2ce/0x3f0
kthread+0xcf/0x100
ret_from_fork+0x31/0x50
ret_from_fork_asm+0x1a/0x30

freed by task 1543 on cpu 4 at 141.586686s (6.665010s ago):
release_nodes+0x43/0xb0
devres_release_all+0x90/0xf0
device_unbind_cleanup+0xe/0x70
device_release_driver_internal+0x1c1/0x200
driver_detach+0x48/0x90
bus_remove_driver+0x6d/0xf0
pci_unregister_driver+0x42/0xb0
__do_sys_delete_module+0x1d1/0x310
do_syscall_64+0x82/0x190
entry_SYSCALL_64_after_hwframe+0x76/0x7e

Fix it by copying the match array with devm_kmemdup_array() before we
modify it.

Solutions

ubuntu-upgrade-linux-image-6-14-0-1010-azureubuntu-upgrade-linux-image-6-14-0-1010-oemubuntu-upgrade-linux-image-6-14-0-1010-realtimeubuntu-upgrade-linux-image-6-14-0-1011-awsubuntu-upgrade-linux-image-6-14-0-1011-aws-64kubuntu-upgrade-linux-image-6-14-0-1011-oracleubuntu-upgrade-linux-image-6-14-0-1011-oracle-64kubuntu-upgrade-linux-image-6-14-0-1012-raspiubuntu-upgrade-linux-image-6-14-0-1014-gcpubuntu-upgrade-linux-image-6-14-0-1014-gcp-64kubuntu-upgrade-linux-image-6-14-0-28-genericubuntu-upgrade-linux-image-6-14-0-28-generic-64kubuntu-upgrade-linux-image-awsubuntu-upgrade-linux-image-aws-6-14ubuntu-upgrade-linux-image-aws-64kubuntu-upgrade-linux-image-aws-64k-6-14ubuntu-upgrade-linux-image-azureubuntu-upgrade-linux-image-azure-6-14ubuntu-upgrade-linux-image-gcpubuntu-upgrade-linux-image-gcp-6-14ubuntu-upgrade-linux-image-gcp-64kubuntu-upgrade-linux-image-gcp-64k-6-14ubuntu-upgrade-linux-image-genericubuntu-upgrade-linux-image-generic-6-14ubuntu-upgrade-linux-image-generic-64kubuntu-upgrade-linux-image-generic-64k-6-14ubuntu-upgrade-linux-image-generic-64k-hwe-24-04ubuntu-upgrade-linux-image-generic-hwe-24-04ubuntu-upgrade-linux-image-oem-24-04ubuntu-upgrade-linux-image-oem-24-04aubuntu-upgrade-linux-image-oem-24-04cubuntu-upgrade-linux-image-oem-6-14ubuntu-upgrade-linux-image-oracleubuntu-upgrade-linux-image-oracle-6-14ubuntu-upgrade-linux-image-oracle-64kubuntu-upgrade-linux-image-oracle-64k-6-14ubuntu-upgrade-linux-image-raspiubuntu-upgrade-linux-image-raspi-6-14ubuntu-upgrade-linux-image-realtimeubuntu-upgrade-linux-image-realtime-6-14ubuntu-upgrade-linux-image-virtualubuntu-upgrade-linux-image-virtual-6-14ubuntu-upgrade-linux-image-virtual-hwe-24-04

References

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