In the Linux kernel, the following vulnerability has been resolved:
virtio-mmio: don't break lifecycle of vm_dev
vm_dev has a separate lifecycle because it has a 'struct device'
embedded. Thus, having a release callback for it is correct.
Allocating the vm_dev struct with devres totally breaks this protection,
though. Instead of waiting for the vm_dev release callback, the memory
is freed when the platform_device is removed. Resulting in a
use-after-free when finally the callback is to be called.
To easily see the problem, compile the kernel with
CONFIG_DEBUG_KOBJECT_RELEASE and unbind with sysfs.
The fix is easy, don't use devres in this case.
Found during my research about object lifetime problems.
Metrics
Affected Vendors & Products
References
History
Mon, 26 Jan 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-416 | |
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:4.15:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:4.15:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:4.15:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:4.15:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:4.15:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:4.15:rc7:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:4.15:rc8:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:4.15:rc9:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.5:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.5:rc6:*:*:*:*:*:* |
|
| Metrics |
cvssV3_1
|
cvssV3_1
|
Thu, 02 Oct 2025 09:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Linux
Linux linux Kernel |
|
| Vendors & Products |
Linux
Linux linux Kernel |
Thu, 02 Oct 2025 00:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| References |
| |
| Metrics |
threat_severity
|
cvssV3_1
|
Wed, 01 Oct 2025 12:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | In the Linux kernel, the following vulnerability has been resolved: virtio-mmio: don't break lifecycle of vm_dev vm_dev has a separate lifecycle because it has a 'struct device' embedded. Thus, having a release callback for it is correct. Allocating the vm_dev struct with devres totally breaks this protection, though. Instead of waiting for the vm_dev release callback, the memory is freed when the platform_device is removed. Resulting in a use-after-free when finally the callback is to be called. To easily see the problem, compile the kernel with CONFIG_DEBUG_KOBJECT_RELEASE and unbind with sysfs. The fix is easy, don't use devres in this case. Found during my research about object lifetime problems. | |
| Title | virtio-mmio: don't break lifecycle of vm_dev | |
| References |
|
|
Status: PUBLISHED
Assigner: Linux
Published: 2025-10-01T11:46:03.192Z
Updated: 2025-10-01T11:46:03.192Z
Reserved: 2025-10-01T11:39:39.406Z
Link: CVE-2023-53515
No data.
Status : Analyzed
Published: 2025-10-01T12:15:55.583
Modified: 2026-01-26T20:11:08.987
Link: CVE-2023-53515