Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: uvc: fix dangling pointers in uvc_function_bind() and uvc_function_unbind() In uvc_function_bind() error path, we use usb_ep_free_request which uses uvc->control_req but does not set it to NULL afterwards. Thus, uvc->control_req is a dangling pointer causing a UAF. Also we do not set the uvc->control_buf pointer to NULL after freeing it, which is another dangling pointer. Fix it by setting uvc->control_req to NULL after we run usb_ep_free_request() and uvc->control_buf to NULL after kfree. Do the same for uvc_function_unbind().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0f9df939385527049c8062a099fbfa1479fe7ce0 before ddb1b0d5d858584ed0d3a5aaa042ee693998c7e2; affected 0f9df939385527049c8062a099fbfa1479fe7ce0 before 85dd5e8bd6776d02854f2847d83429f1f712e99c; affected 0f9df939385527049c8062a099fbfa1479fe7ce0 before 502a7f5b79b7ba751988789e982924f8f496129f; affected 0f9df939385527049c8062a099fbfa1479fe7ce0 before bec7708eb3b5295d12e931db24381b7c94c72953; affected 0f9df939385527049c8062a099fbfa1479fe7ce0 before 8e88ed8a374de67270d38689f2a81018909cafbb; affected 0f9df939385527049c8062a099fbfa1479fe7ce0 before 9897b7da8c0ad8356c1b8649379fcb5a689462cb; affected 0f9df939385527049c8062a099fbfa1479fe7ce0 before 38f822ddce9355893d734279a26ddec45182197e; affected 0f9df939385527049c8062a099fbfa1479fe7ce0 before bdab5605259ba5d6ff927c1a85cc83eb3ecfdacc; affected 1efa8a5aac93d9e67075995d7d4902b57ce184f7; affected e7a4b0efe62e56a0acc81d16091c6efc2a282be8; affected 065f5561a20659cf17aae5f72b32b5c2695c8e00; affected 3.2.36 before 3.3; affected 3.4.25 before 3.5; affected 3.7.2 before 3.8 |
| Linux / Linux | affected 3.8; unaffected 0 before 3.8; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.109 through 6.12.*; unaffected 6.18.50 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/ddb1b0d5d858584ed0d3a5aaa042ee693998c7e2
- https://git.kernel.org/stable/c/85dd5e8bd6776d02854f2847d83429f1f712e99c
- https://git.kernel.org/stable/c/502a7f5b79b7ba751988789e982924f8f496129f
- https://git.kernel.org/stable/c/bec7708eb3b5295d12e931db24381b7c94c72953
- https://git.kernel.org/stable/c/8e88ed8a374de67270d38689f2a81018909cafbb
- https://git.kernel.org/stable/c/9897b7da8c0ad8356c1b8649379fcb5a689462cb
- https://git.kernel.org/stable/c/38f822ddce9355893d734279a26ddec45182197e
- https://git.kernel.org/stable/c/bdab5605259ba5d6ff927c1a85cc83eb3ecfdacc