In the Linux kernel, the following vulnerability has been resolved:
greybus: Fix use-after-free bug in gb_interface_release due to race condition.
In gb_interface_create, &intf->mode_switch_completion is bound with
gb_interface_mode_switch_work. Then it will be started by
gb_interface_request_mode_switch. Here is the relevant code.
if (!queue_work(system_long_wq, &intf->mode_switch_work)) {
...
}
If we call gb_interface_release to make cleanup, there may be an
unfinished work. This function will call kfree to free the object
"intf". However, if gb_interface_mode_switch_work is scheduled to
run after kfree, it may cause use-after-free error as
gb_interface_mode_switch_work will use the object "intf".
The possible execution flow that may lead to the issue is as follows:
CPU0 CPU1
| gb_interface_create
| gb_interface_request_mode_switch
gb_interface_release |
kfree(intf) (free) |
| gb_interface_mode_switch_work
| mutex_lock(&intf->mutex) (use)
Fix it by canceling the work before kfree.
References
Configurations
Configuration 1 (hide)
|
History
24 Jul 2024, 19:04
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-416 | |
| References | () https://git.kernel.org/stable/c/2b6bb0b4abfd79b8698ee161bb73c0936a2aaf83 - Patch | |
| References | () https://git.kernel.org/stable/c/fb071f5c75d4b1c177824de74ee75f9dd34123b9 - Patch | |
| References | () https://git.kernel.org/stable/c/0b8fba38bdfb848fac52e71270b2aa3538c996ea - Patch | |
| References | () https://git.kernel.org/stable/c/03ea2b129344152157418929f06726989efc0445 - Patch | |
| References | () https://git.kernel.org/stable/c/9a733d69a4a59c2d08620e6589d823c24be773dc - Patch | |
| References | () https://git.kernel.org/stable/c/74cd0a421896b2e07eafe7da4275302bfecef201 - Patch | |
| References | () https://git.kernel.org/stable/c/5c9c5d7f26acc2c669c1dcf57d1bb43ee99220ce - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| First Time |
Linux
Linux linux Kernel |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
12 Jul 2024, 13:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2024-07-12 13:15
Updated : 2024-08-20 15:35
NVD link : CVE-2024-39495
Mitre link : CVE-2024-39495
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-416
Use After Free