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CVE-2026-74679

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Last modified

CVE-2026-74679 is a vulnerability of currently unknown severity. 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..

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 370af734dfaf8336b496b386e194648e097e248a, < 9c8c6825a750fcd3efbe922847ca70ccd5a66857; >= 370af734dfaf8336b496b386e194648e097e248a, < a1c0deeba4a46481543d6b09c665f758c54c3a1a; >= 370af734dfaf8336b496b386e194648e097e248a, < d13f650a3485b58c124b3cda45597e8002c9c833; >= 370af734dfaf8336b496b386e194648e097e248a, < 11413d7ed42174b8f5d8d0b6a25d10dc88239b21; >= 370af734dfaf8336b496b386e194648e097e248a, < 5b2b3a3229a3f4c493ffdee53aee2f173b6f13b3; >= 370af734dfaf8336b496b386e194648e097e248a, < d328fdc607fa1bb668ad512e1c918a120f78f337; >= 370af734dfaf8336b496b386e194648e097e248a, < fc9e54e22845c4da29588ca0986cb7c795b5a262; >= 370af734dfaf8336b496b386e194648e097e248a, < 6b1c8a9403a26cb0fed7a648916c74dc236da591
LinuxLinux3.17

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-74679?
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.
How severe is CVE-2026-74679?
Severity scoring for CVE-2026-74679 is pending analysis.
How do I fix CVE-2026-74679?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST