CVE-2026-68366
usb: gadget: uvc: clamp SEND_RESPONSE length to the response buffer
Description
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: uvc: clamp SEND_RESPONSE length to the response buffer uvc_send_response() builds the UVC control response from a user-supplied struct uvc_request_data: req->length = min_t(unsigned int, uvc->event_length, data->length); ... memcpy(req->buf, data->data, req->length); req->length is clamped to uvc->event_length, which is taken from the host control request wLength (up to UVC_MAX_REQUEST_SIZE, 64), and to data->length, which comes from the UVCIOC_SEND_RESPONSE ioctl and is only checked for being negative. The source buffer data->data is only 60 bytes, so a response with uvc->event_length and data->length both greater than 60 makes memcpy() read past the end of data->data. Clamp req->length to sizeof(data->data) as well.
INFO
Published Date :
Aug. 10, 2026, 1:20 p.m.
Last Modified :
Aug. 10, 2026, 1:20 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-68366
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Clamp response length to source buffer size.
- Ensure data->length is validated.
- Update the Linux kernel.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-68366.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68366 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-68366
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-68366 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68366 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 10, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1', 'lessThan': '4e116372b7a4f87df0dc0ed4b0ab5b0bb0cc5796', 'versionType': 'git'}, {'status': 'affected', 'version': 'a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1', 'lessThan': '662f6c6c6ff8a6c508e1646c09cae74e28f3cca6', 'versionType': 'git'}, {'status': 'affected', 'version': 'a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1', 'lessThan': '1f03658f3e9b2f8fd1d1003ba389a0390b49a350', 'versionType': 'git'}, {'status': 'affected', 'version': 'a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1', 'lessThan': 'c8510fbbea09ef0170b56b14dc2b5890dc75be07', 'versionType': 'git'}, {'status': 'affected', 'version': 'a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1', 'lessThan': 'b70dc75e85ba968b7b76eebfe5d63000080b875b', 'versionType': 'git'}], 'programFiles': ['drivers/usb/gadget/function/uvc_v4l2.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.10'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.10', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/usb/gadget/function/uvc_v4l2.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: usb: gadget: uvc: clamp SEND_RESPONSE length to the response buffer uvc_send_response() builds the UVC control response from a user-supplied struct uvc_request_data: req->length = min_t(unsigned int, uvc->event_length, data->length); ... memcpy(req->buf, data->data, req->length); req->length is clamped to uvc->event_length, which is taken from the host control request wLength (up to UVC_MAX_REQUEST_SIZE, 64), and to data->length, which comes from the UVCIOC_SEND_RESPONSE ioctl and is only checked for being negative. The source buffer data->data is only 60 bytes, so a response with uvc->event_length and data->length both greater than 60 makes memcpy() read past the end of data->data. Clamp req->length to sizeof(data->data) as well. Added Reference https://git.kernel.org/stable/c/1f03658f3e9b2f8fd1d1003ba389a0390b49a350 Added Reference https://git.kernel.org/stable/c/4e116372b7a4f87df0dc0ed4b0ab5b0bb0cc5796 Added Reference https://git.kernel.org/stable/c/662f6c6c6ff8a6c508e1646c09cae74e28f3cca6 Added Reference https://git.kernel.org/stable/c/b70dc75e85ba968b7b76eebfe5d63000080b875b Added Reference https://git.kernel.org/stable/c/c8510fbbea09ef0170b56b14dc2b5890dc75be07