Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: fbdev: bound mode sysfs output to the sysfs buffer mode_string() uses snprintf() which can return a value larger than the remaining buffer space. show_modes() accumulates the return value into i without checking whether i has reached PAGE_SIZE, causing the offset to advance past the sysfs buffer if the modelist is long enough. Add a size parameter to mode_string() and use scnprintf() to return only the bytes actually written. Add an early return when offset already exceeds the buffer. In show_modes(), stop accumulating once the buffer is full.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 873a1aa15c313263f2e18b38cf525623cc4fabf6; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d15d51fb26e830af58f3f21964f1c09c239077ea |
| Linux / Linux | affected 2.6.12; unaffected 0 before 2.6.12; unaffected 7.1.10 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/873a1aa15c313263f2e18b38cf525623cc4fabf6
- https://git.kernel.org/stable/c/d15d51fb26e830af58f3f21964f1c09c239077ea
ADP enrichment
No English description supplied.
No references supplied.