🔐 CVE Alert

CVE-2026-89733

HIGH 7.8

usb: gadget: uvc: fix dangling pointers in uvc_function_bind() and uvc_function_unbind()

CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th

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().

Vendor linux
Product linux
Ecosystems
Industries
Technology
Published Sep 11, 2026
Last Updated Sep 14, 2026
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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability

Affected Versions

Linux / Linux
0f9df939385527049c8062a099fbfa1479fe7ce0 < ddb1b0d5d858584ed0d3a5aaa042ee693998c7e2 0f9df939385527049c8062a099fbfa1479fe7ce0 < 85dd5e8bd6776d02854f2847d83429f1f712e99c 0f9df939385527049c8062a099fbfa1479fe7ce0 < 502a7f5b79b7ba751988789e982924f8f496129f 0f9df939385527049c8062a099fbfa1479fe7ce0 < bec7708eb3b5295d12e931db24381b7c94c72953 0f9df939385527049c8062a099fbfa1479fe7ce0 < 8e88ed8a374de67270d38689f2a81018909cafbb 0f9df939385527049c8062a099fbfa1479fe7ce0 < 9897b7da8c0ad8356c1b8649379fcb5a689462cb 0f9df939385527049c8062a099fbfa1479fe7ce0 < 38f822ddce9355893d734279a26ddec45182197e 0f9df939385527049c8062a099fbfa1479fe7ce0 < bdab5605259ba5d6ff927c1a85cc83eb3ecfdacc 1efa8a5aac93d9e67075995d7d4902b57ce184f7 e7a4b0efe62e56a0acc81d16091c6efc2a282be8 065f5561a20659cf17aae5f72b32b5c2695c8e00 3.2.36 < 3.3 3.4.25 < 3.5 3.7.2 < 3.8
Linux / Linux
3.8

References

NVD ↗ CVE.org ↗ EPSS Data ↗
git.kernel.org: https://git.kernel.org/stable/c/ddb1b0d5d858584ed0d3a5aaa042ee693998c7e2 git.kernel.org: https://git.kernel.org/stable/c/85dd5e8bd6776d02854f2847d83429f1f712e99c git.kernel.org: https://git.kernel.org/stable/c/502a7f5b79b7ba751988789e982924f8f496129f git.kernel.org: https://git.kernel.org/stable/c/bec7708eb3b5295d12e931db24381b7c94c72953 git.kernel.org: https://git.kernel.org/stable/c/8e88ed8a374de67270d38689f2a81018909cafbb git.kernel.org: https://git.kernel.org/stable/c/9897b7da8c0ad8356c1b8649379fcb5a689462cb git.kernel.org: https://git.kernel.org/stable/c/38f822ddce9355893d734279a26ddec45182197e git.kernel.org: https://git.kernel.org/stable/c/bdab5605259ba5d6ff927c1a85cc83eb3ecfdacc