CVE-2026-89733usb: gadget: uvc: fix dangling pointers in uvc_function_bind() and uvc_function_unbind()
Updated under an hour ago ()
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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().
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 0f9df939385527049c8062a099fbfa1479fe7ce0 before ddb1b0d5d858584ed0d3a5aaa042ee693998c7e2; from 0f9df939385527049c8062a099fbfa1479fe7ce0 before 85dd5e8bd6776d02854f2847d83429f1f712e99c; from 0f9df939385527049c8062a099fbfa1479fe7ce0 before 502a7f5b79b7ba751988789e982924f8f496129f; from 0f9df939385527049c8062a099fbfa1479fe7ce0 before bec7708eb3b5295d12e931db24381b7c94c72953; from 0f9df939385527049c8062a099fbfa1479fe7ce0 before 8e88ed8a374de67270d38689f2a81018909cafbb; from 0f9df939385527049c8062a099fbfa1479fe7ce0 before 9897b7da8c0ad8356c1b8649379fcb5a689462cb; from 0f9df939385527049c8062a099fbfa1479fe7ce0 before 38f822ddce9355893d734279a26ddec45182197e; from 0f9df939385527049c8062a099fbfa1479fe7ce0 before bdab5605259ba5d6ff927c1a85cc83eb3ecfdacc; and 6 more ranges | CNA record |
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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.