CVE-2026-74679
usb: gadget: f_ncm: Use unsigned int for ndp_index
Description
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_ncm: Use unsigned int for ndp_index The variable ndp_index is declared as a signed integer, but it stores the return value of get_ncm(), which is unsigned. A malicious host can supply a large offset that overflows the signed ndp_index, making it negative. Because ndp_index is compared against unsigned bounds, this negative value bypasses sanity checks and leads to an out-of-bounds read when calculating the address of the NDP block (ntb_ptr + ndp_index). Fix this by changing ndp_index to unsigned int to ensure consistent unsigned comparisons throughout the function.
INFO
Published Date :
Aug. 22, 2026, 4:16 p.m.
Last Modified :
Aug. 22, 2026, 4:16 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-74679
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
- Update the Linux kernel to the latest version.
- Ensure ndp_index is treated as an unsigned integer.
- Apply the provided patch for the NCM gadget driver.
- Verify the integrity of NCM driver operations.
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-2026-74679.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74679 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-2026-74679
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-2026-74679 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74679 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. 22, 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': '370af734dfaf8336b496b386e194648e097e248a', 'lessThan': '9c8c6825a750fcd3efbe922847ca70ccd5a66857', 'versionType': 'git'}, {'status': 'affected', 'version': '370af734dfaf8336b496b386e194648e097e248a', 'lessThan': 'a1c0deeba4a46481543d6b09c665f758c54c3a1a', 'versionType': 'git'}, {'status': 'affected', 'version': '370af734dfaf8336b496b386e194648e097e248a', 'lessThan': 'd13f650a3485b58c124b3cda45597e8002c9c833', 'versionType': 'git'}, {'status': 'affected', 'version': '370af734dfaf8336b496b386e194648e097e248a', 'lessThan': '11413d7ed42174b8f5d8d0b6a25d10dc88239b21', 'versionType': 'git'}, {'status': 'affected', 'version': '370af734dfaf8336b496b386e194648e097e248a', 'lessThan': '5b2b3a3229a3f4c493ffdee53aee2f173b6f13b3', 'versionType': 'git'}, {'status': 'affected', 'version': '370af734dfaf8336b496b386e194648e097e248a', 'lessThan': 'd328fdc607fa1bb668ad512e1c918a120f78f337', 'versionType': 'git'}, {'status': 'affected', 'version': '370af734dfaf8336b496b386e194648e097e248a', 'lessThan': 'fc9e54e22845c4da29588ca0986cb7c795b5a262', 'versionType': 'git'}, {'status': 'affected', 'version': '370af734dfaf8336b496b386e194648e097e248a', 'lessThan': '6b1c8a9403a26cb0fed7a648916c74dc236da591', 'versionType': 'git'}], 'programFiles': ['drivers/usb/gadget/function/f_ncm.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.17', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.265', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.216', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.183', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.152', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.104', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.45', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.9', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/usb/gadget/function/f_ncm.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_ncm: Use unsigned int for ndp_index The variable ndp_index is declared as a signed integer, but it stores the return value of get_ncm(), which is unsigned. A malicious host can supply a large offset that overflows the signed ndp_index, making it negative. Because ndp_index is compared against unsigned bounds, this negative value bypasses sanity checks and leads to an out-of-bounds read when calculating the address of the NDP block (ntb_ptr + ndp_index). Fix this by changing ndp_index to unsigned int to ensure consistent unsigned comparisons throughout the function. Added Reference https://git.kernel.org/stable/c/11413d7ed42174b8f5d8d0b6a25d10dc88239b21 Added Reference https://git.kernel.org/stable/c/5b2b3a3229a3f4c493ffdee53aee2f173b6f13b3 Added Reference https://git.kernel.org/stable/c/6b1c8a9403a26cb0fed7a648916c74dc236da591 Added Reference https://git.kernel.org/stable/c/9c8c6825a750fcd3efbe922847ca70ccd5a66857 Added Reference https://git.kernel.org/stable/c/a1c0deeba4a46481543d6b09c665f758c54c3a1a Added Reference https://git.kernel.org/stable/c/d13f650a3485b58c124b3cda45597e8002c9c833 Added Reference https://git.kernel.org/stable/c/d328fdc607fa1bb668ad512e1c918a120f78f337 Added Reference https://git.kernel.org/stable/c/fc9e54e22845c4da29588ca0986cb7c795b5a262