CVE-2026-90023
usb: gadget: f_mass_storage: fix null pointer dereference in fsg_common_set_num_buffers()
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 16, 2026 |
| Last Updated | Oct 30, 2026 |
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Affected Versions
Linux / Linux
fe5a6c48fd954489f51aab151d5dad9254c76419 < 38edd187a37db0d8e4bf84cc954dbdbe7bfa366f fe5a6c48fd954489f51aab151d5dad9254c76419 < e54820b9dc1d6d731ecc3e51462445dc952906a7 fe5a6c48fd954489f51aab151d5dad9254c76419 < 5d56dbaeb81d5cd967cdee8ddcc70814b7139246 fe5a6c48fd954489f51aab151d5dad9254c76419 < f4f0fe3ab47ed57ee4974fdd3e9dccb7839a7ebf fe5a6c48fd954489f51aab151d5dad9254c76419 < 51cc9af4f2d3f0b765266aced66b9b532b423b13 fe5a6c48fd954489f51aab151d5dad9254c76419 < 9e8dd2a7a8ccbb756771ad985b0ad3387ed3c957 fe5a6c48fd954489f51aab151d5dad9254c76419 < b9b5b5df5b8dd3c1572ed267200276a44cc67d8e fe5a6c48fd954489f51aab151d5dad9254c76419 < 2c0f5ca48674a5b5f9fa4a9c3325aa48053af0bc
Linux / Linux
4.8
References
git.kernel.org: https://git.kernel.org/stable/c/38edd187a37db0d8e4bf84cc954dbdbe7bfa366f git.kernel.org: https://git.kernel.org/stable/c/e54820b9dc1d6d731ecc3e51462445dc952906a7 git.kernel.org: https://git.kernel.org/stable/c/5d56dbaeb81d5cd967cdee8ddcc70814b7139246 git.kernel.org: https://git.kernel.org/stable/c/f4f0fe3ab47ed57ee4974fdd3e9dccb7839a7ebf git.kernel.org: https://git.kernel.org/stable/c/51cc9af4f2d3f0b765266aced66b9b532b423b13 git.kernel.org: https://git.kernel.org/stable/c/9e8dd2a7a8ccbb756771ad985b0ad3387ed3c957 git.kernel.org: https://git.kernel.org/stable/c/b9b5b5df5b8dd3c1572ed267200276a44cc67d8e git.kernel.org: https://git.kernel.org/stable/c/2c0f5ca48674a5b5f9fa4a9c3325aa48053af0bc