Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: Input: synaptics-rmi4 - bound the F3A keymap to the GPIO count rmi_f3a_initialize() takes the GPIO count from the device query register (f3a->gpio_count = buf & RMI_F3A_GPIO_COUNT, range 0..127). rmi_f3a_map_gpios() then allocates gpio_key_map with min(gpio_count, TRACKSTICK_RANGE_END) == at most 6 entries, but rmi_f3a_attention() iterates the full gpio_count and dereferences gpio_key_map[i], and input->keycodemax is set to the full gpio_count while input->keycode points at the 6-entry allocation. A device that reports gpio_count > 6 therefore causes an out-of-bounds read of gpio_key_map[] on every attention interrupt, and out-of-bounds accesses through the input core's default keymap ioctls: EVIOCGKEYCODE reads past the buffer (leaking adjacent slab memory to user space) and EVIOCSKEYCODE writes a caller-controlled value past it, for any process able to open the evdev node, since input_default_getkeycode() and input_default_setkeycode() only bound the index against keycodemax. Size the keymap for the full gpio_count. The mapping loop is unchanged: it still assigns only the first min(gpio_count, TRACKSTICK_RANGE_END) entries; the remaining slots stay KEY_RESERVED (devm_kcalloc zero-fills) and are skipped when reporting.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 9e4c596bfd004f447a652205163234dfd4aafa69 before 502ad7caaa1a445b734c827fa256e5311df67e3d; affected 9e4c596bfd004f447a652205163234dfd4aafa69 before 3480e24bc4e178aaa009edb25b6ee12df199e210; affected 9e4c596bfd004f447a652205163234dfd4aafa69 before 35ed74d32d8260bdfb14a94caf402bf0866bdeec; affected 9e4c596bfd004f447a652205163234dfd4aafa69 before ba57f430328534501962d60d651e385ffd7af9ca; affected 9e4c596bfd004f447a652205163234dfd4aafa69 before 850117b637bcb1dcc14be0cf09ac819a8707b42c; affected 9e4c596bfd004f447a652205163234dfd4aafa69 before 8db211aed83733073b0814adaeeab61d4521474e; affected 9e4c596bfd004f447a652205163234dfd4aafa69 before 64fb0e1161ccc6b9e48b8df61f07d3c34c01ec42; affected 9e4c596bfd004f447a652205163234dfd4aafa69 before 57c10915f2c16c90e0d46ad00876bf39ece40fc2 |
| Linux / Linux | affected 5.10; unaffected 0 before 5.10; unaffected 5.10.261 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.96 through 6.12.*; unaffected 6.18.39 through 6.18.*; unaffected 7.1.4 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/502ad7caaa1a445b734c827fa256e5311df67e3d
- https://git.kernel.org/stable/c/3480e24bc4e178aaa009edb25b6ee12df199e210
- https://git.kernel.org/stable/c/35ed74d32d8260bdfb14a94caf402bf0866bdeec
- https://git.kernel.org/stable/c/ba57f430328534501962d60d651e385ffd7af9ca
- https://git.kernel.org/stable/c/850117b637bcb1dcc14be0cf09ac819a8707b42c
- https://git.kernel.org/stable/c/8db211aed83733073b0814adaeeab61d4521474e
- https://git.kernel.org/stable/c/64fb0e1161ccc6b9e48b8df61f07d3c34c01ec42
- https://git.kernel.org/stable/c/57c10915f2c16c90e0d46ad00876bf39ece40fc2
ADP enrichment
No English description supplied.
No references supplied.