Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected fe5a6c48fd954489f51aab151d5dad9254c76419 before f4f0fe3ab47ed57ee4974fdd3e9dccb7839a7ebf; affected fe5a6c48fd954489f51aab151d5dad9254c76419 before 51cc9af4f2d3f0b765266aced66b9b532b423b13; affected fe5a6c48fd954489f51aab151d5dad9254c76419 before 9e8dd2a7a8ccbb756771ad985b0ad3387ed3c957; affected fe5a6c48fd954489f51aab151d5dad9254c76419 before b9b5b5df5b8dd3c1572ed267200276a44cc67d8e; affected fe5a6c48fd954489f51aab151d5dad9254c76419 before 2c0f5ca48674a5b5f9fa4a9c3325aa48053af0bc |
| Linux / Linux | affected 4.8; unaffected 0 before 4.8; unaffected 6.6.160 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.5 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- 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