CVE-2026-89733 is a vulnerability in Linux Kernel
Published on September 11, 2026
usb: gadget: uvc: fix dangling pointers in uvc_function_bind() and uvc_function_unbind()
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().
Products Associated with CVE-2026-89733
Want to know whenever a new CVE is published for Linux Kernel? stack.watch will email you.
Affected Versions
Linux:- Version 0f9df939385527049c8062a099fbfa1479fe7ce0 and below 8e88ed8a374de67270d38689f2a81018909cafbb is affected.
- Version 0f9df939385527049c8062a099fbfa1479fe7ce0 and below 9897b7da8c0ad8356c1b8649379fcb5a689462cb is affected.
- Version 0f9df939385527049c8062a099fbfa1479fe7ce0 and below 38f822ddce9355893d734279a26ddec45182197e is affected.
- Version 0f9df939385527049c8062a099fbfa1479fe7ce0 and below bdab5605259ba5d6ff927c1a85cc83eb3ecfdacc is affected.
- Version 1efa8a5aac93d9e67075995d7d4902b57ce184f7 is affected.
- Version e7a4b0efe62e56a0acc81d16091c6efc2a282be8 is affected.
- Version 065f5561a20659cf17aae5f72b32b5c2695c8e00 is affected.
- Version 3.2.36 and below 3.3 is affected.
- Version 3.4.25 and below 3.5 is affected.
- Version 3.7.2 and below 3.8 is affected.
- Version 3.8 is affected.
- Before 3.8 is unaffected.
- Version 6.12.109, <= 6.12.* is unaffected.
- Version 6.18.50, <= 6.18.* is unaffected.
- Version 7.2.4, <= 7.2.* is unaffected.
- Version 7.3-rc1, <= * is unaffected.