CVE-2026-74679
usb: gadget: f_ncm: Use unsigned int for ndp_index
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
3.17
References 8
git.kernel.org
- stable/c/9c8c6825a750fcd3efbe922847ca70ccd5a66857
- stable/c/a1c0deeba4a46481543d6b09c665f758c54c3a1a
- stable/c/d13f650a3485b58c124b3cda45597e8002c9c833
- stable/c/11413d7ed42174b8f5d8d0b6a25d10dc88239b21
- stable/c/5b2b3a3229a3f4c493ffdee53aee2f173b6f13b3
- stable/c/d328fdc607fa1bb668ad512e1c918a120f78f337
- stable/c/fc9e54e22845c4da29588ca0986cb7c795b5a262
- stable/c/6b1c8a9403a26cb0fed7a648916c74dc236da591