{"id":"CVE-2026-74679","summary":"usb: gadget: f_ncm: Use unsigned int for ndp_index","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_ncm: Use unsigned int for ndp_index\n\nThe variable ndp_index is declared as a signed integer, but it stores\nthe return value of get_ncm(), which is unsigned.\n\nA malicious host can supply a large offset that overflows the signed\nndp_index, making it negative. Because ndp_index is compared against\nunsigned bounds, this negative value bypasses sanity checks and leads\nto an out-of-bounds read when calculating the address of the NDP\nblock (ntb_ptr + ndp_index).\n\nFix this by changing ndp_index to unsigned int to ensure consistent\nunsigned comparisons throughout the function.","modified":"2026-08-24T11:47:18.095658622Z","published":"2026-08-22T15:32:47.499Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74679.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/11413d7ed42174b8f5d8d0b6a25d10dc88239b21"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5b2b3a3229a3f4c493ffdee53aee2f173b6f13b3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6b1c8a9403a26cb0fed7a648916c74dc236da591"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9c8c6825a750fcd3efbe922847ca70ccd5a66857"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a1c0deeba4a46481543d6b09c665f758c54c3a1a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d13f650a3485b58c124b3cda45597e8002c9c833"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d328fdc607fa1bb668ad512e1c918a120f78f337"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fc9e54e22845c4da29588ca0986cb7c795b5a262"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74679.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74679"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"370af734dfaf8336b496b386e194648e097e248a"},{"fixed":"9c8c6825a750fcd3efbe922847ca70ccd5a66857"},{"fixed":"a1c0deeba4a46481543d6b09c665f758c54c3a1a"},{"fixed":"d13f650a3485b58c124b3cda45597e8002c9c833"},{"fixed":"11413d7ed42174b8f5d8d0b6a25d10dc88239b21"},{"fixed":"5b2b3a3229a3f4c493ffdee53aee2f173b6f13b3"},{"fixed":"d328fdc607fa1bb668ad512e1c918a120f78f337"},{"fixed":"fc9e54e22845c4da29588ca0986cb7c795b5a262"},{"fixed":"6b1c8a9403a26cb0fed7a648916c74dc236da591"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74679.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.17.0"},{"fixed":"5.10.265"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.216"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.183"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.152"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.104"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.45"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74679.json"}}],"schema_version":"1.9.0"}