In the Linux kernel, the following vulnerability has been resolved:
dmaengine: idxd: Prevent use after free on completion memory
On driver unload any pending descriptors are flushed at the
time the interrupt is freed:
idxd_dmaengine_drv_remove() ->
drv_disable_wq() ->
idxd_wq_free_irq() ->
idxd_flush_pending_descs().
If there are any descriptors present that need to be flushed this
flow triggers a "not present" page fault as below:
BUG: unable to handle page fault for address: ff391c97c70c9040
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
The address that triggers the fault is the address of the
descriptor that was freed moments earlier via:
drv_disable_wq()->idxd_wq_free_resources()
Fix the use after free by freeing the descriptors after any possible
usage. This is done after idxd_wq_reset() to ensure that the memory
remains accessible during possible completion writes by the device.
References
Configurations
History
06 Sep 2024, 14:15
Type | Values Removed | Values Added |
---|---|---|
CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
CWE | CWE-416 | |
References | () https://git.kernel.org/stable/c/1beeec45f9ac31eba52478379f70a5fa9c2ad005 - Patch | |
References | () https://git.kernel.org/stable/c/b9e8e3fcfec625fc1c2f68f684448aeeb882625b - Patch | |
Summary |
|
|
First Time |
Linux linux Kernel
Linux |
|
CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
21 Aug 2024, 07:15
Type | Values Removed | Values Added |
---|---|---|
New CVE |
Information
Published : 2024-08-21 07:15
Updated : 2024-09-06 14:15
NVD link : CVE-2022-48867
Mitre link : CVE-2022-48867
CVE.ORG link : CVE-2022-48867
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-416
Use After Free