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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
fe5a6c48fd954489f51aab151d5dad9254c76419 to < 38edd187a37db0d8e4bf84cc954dbdbe7bfa366faffectedfe5a6c48fd954489f51aab151d5dad9254c76419 to < e54820b9dc1d6d731ecc3e51462445dc952906a7affectedfe5a6c48fd954489f51aab151d5dad9254c76419 to < 5d56dbaeb81d5cd967cdee8ddcc70814b7139246affectedfe5a6c48fd954489f51aab151d5dad9254c76419 to < f4f0fe3ab47ed57ee4974fdd3e9dccb7839a7ebfaffectedfe5a6c48fd954489f51aab151d5dad9254c76419 to < 51cc9af4f2d3f0b765266aced66b9b532b423b13affectedfe5a6c48fd954489f51aab151d5dad9254c76419 to < 9e8dd2a7a8ccbb756771ad985b0ad3387ed3c957affectedfe5a6c48fd954489f51aab151d5dad9254c76419 to < b9b5b5df5b8dd3c1572ed267200276a44cc67d8eaffectedfe5a6c48fd954489f51aab151d5dad9254c76419 to < 2c0f5ca48674a5b5f9fa4a9c3325aa48053af0bcaffected
Linux Linux
Default version status: affected
4.8affected0 to < 4.8unaffected5.10.273 to ≤ 5.10.*unaffected5.15.224 to ≤ 5.15.*unaffected6.1.191 to ≤ 6.1.*unaffected6.6.160 to ≤ 6.6.*unaffected6.12.112 to ≤ 6.12.*unaffected6.18.52 to ≤ 6.18.*unaffected7.2.5 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/38edd187a37db0d8e4bf84cc954dbdbe7bfa366f ↗
- https://git.kernel.org/stable/c/e54820b9dc1d6d731ecc3e51462445dc952906a7 ↗
- https://git.kernel.org/stable/c/5d56dbaeb81d5cd967cdee8ddcc70814b7139246 ↗
- https://git.kernel.org/stable/c/f4f0fe3ab47ed57ee4974fdd3e9dccb7839a7ebf ↗
- https://git.kernel.org/stable/c/51cc9af4f2d3f0b765266aced66b9b532b423b13 ↗
- https://git.kernel.org/stable/c/9e8dd2a7a8ccbb756771ad985b0ad3387ed3c957 ↗
- https://git.kernel.org/stable/c/b9b5b5df5b8dd3c1572ed267200276a44cc67d8e ↗
- https://git.kernel.org/stable/c/2c0f5ca48674a5b5f9fa4a9c3325aa48053af0bc ↗