Description
In the Linux kernel, the following vulnerability has been resolved:
usb: gadget: f_mass_storage: fix null pointer dereference in fsg_common_set_num_buffers()
Previously fsg_num_buffers_validate() was removed as it was not necessary due to Kconfig setting the limits for n from 2 to 256 with default as 2. However, setting the page content in such a way that kstrtou8() reflects n value as either 0 or 1 bypasses these restrictions leading to a null pointer dereference if n is 0. Fix this by adding a check for n < 2 and returning -EINVAL if n is either 0 or 1 consistent with Kconfig logic.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= fe5a6c48fd954489f51aab151d5dad9254c76419, < 38edd187a37db0d8e4bf84cc954dbdbe7bfa366f; >= fe5a6c48fd954489f51aab151d5dad9254c76419, < e54820b9dc1d6d731ecc3e51462445dc952906a7; >= fe5a6c48fd954489f51aab151d5dad9254c76419, < 5d56dbaeb81d5cd967cdee8ddcc70814b7139246; >= fe5a6c48fd954489f51aab151d5dad9254c76419, < f4f0fe3ab47ed57ee4974fdd3e9dccb7839a7ebf; >= fe5a6c48fd954489f51aab151d5dad9254c76419, < 51cc9af4f2d3f0b765266aced66b9b532b423b13; >= fe5a6c48fd954489f51aab151d5dad9254c76419, < 9e8dd2a7a8ccbb756771ad985b0ad3387ed3c957; >= fe5a6c48fd954489f51aab151d5dad9254c76419, < b9b5b5df5b8dd3c1572ed267200276a44cc67d8e; >= fe5a6c48fd954489f51aab151d5dad9254c76419, < 2c0f5ca48674a5b5f9fa4a9c3325aa48053af0bc |
| Linux | Linux | 4.8 |
References
- https://git.kernel.org/stable/c/2c0f5ca48674a5b5f9fa4a9c3325aa48053af0bc
- https://git.kernel.org/stable/c/38edd187a37db0d8e4bf84cc954dbdbe7bfa366f
- https://git.kernel.org/stable/c/51cc9af4f2d3f0b765266aced66b9b532b423b13
- https://git.kernel.org/stable/c/5d56dbaeb81d5cd967cdee8ddcc70814b7139246
- https://git.kernel.org/stable/c/9e8dd2a7a8ccbb756771ad985b0ad3387ed3c957
- https://git.kernel.org/stable/c/b9b5b5df5b8dd3c1572ed267200276a44cc67d8e
- https://git.kernel.org/stable/c/e54820b9dc1d6d731ecc3e51462445dc952906a7
- https://git.kernel.org/stable/c/f4f0fe3ab47ed57ee4974fdd3e9dccb7839a7ebf
Timeline
- Published
- Sep 16, 2026
- Last modified
- Oct 30, 2026
- NVD status
- Received