CVE-2026-74679
N/AIn 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.
No known exploitation, public exploit, or elevated probability at this time. Track for changes.
Exploitation likelihood
—EPSS not yet scored
Impact if exploited
—CVSS · not scored
- No impact metrics
Proof of concept & exploit code
- github-search Search GitHub for public PoC repos
Test against your own equipment
curl -s https://vulnpedia.com/cve/CVE-2026-74679/poc.jsonMachine-readable PoC index for this CVE (for automation).Listed for defensive triage, patch verification, and authorized testing on systems you own. Machine-readable: /cve/CVE-2026-74679/poc.json
References
Technical & other
- https://git.kernel.org/stable/c/9c8c6825a750fcd3efbe922847ca70ccd5a66857
- https://git.kernel.org/stable/c/a1c0deeba4a46481543d6b09c665f758c54c3a1a
- https://git.kernel.org/stable/c/d13f650a3485b58c124b3cda45597e8002c9c833
- https://git.kernel.org/stable/c/11413d7ed42174b8f5d8d0b6a25d10dc88239b21
- https://git.kernel.org/stable/c/5b2b3a3229a3f4c493ffdee53aee2f173b6f13b3
- https://git.kernel.org/stable/c/d328fdc607fa1bb668ad512e1c918a120f78f337
- https://git.kernel.org/stable/c/fc9e54e22845c4da29588ca0986cb7c795b5a262
- https://git.kernel.org/stable/c/6b1c8a9403a26cb0fed7a648916c74dc236da591