Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: iio: gyro: bmg160: bail out when bandwidth/filter is not in table bmg160_get_filter() walks bmg160_samp_freq_table[] looking for the entry matching the bw_bits value read from the chip: for (i = 0; i < ARRAY_SIZE(bmg160_samp_freq_table); ++i) { if (bmg160_samp_freq_table[i].bw_bits == bw_bits) break; } *val = bmg160_samp_freq_table[i].filter; If no entry matches, i ends up equal to the array size and the next line reads one slot past the end. bmg160_set_filter() has the same shape, driven by 'val' instead of bw_bits. smatch flags both: drivers/iio/gyro/bmg160_core.c:204 bmg160_get_filter() error: buffer overflow 'bmg160_samp_freq_table' 7 <= 7 drivers/iio/gyro/bmg160_core.c:222 bmg160_set_filter() error: buffer overflow 'bmg160_samp_freq_table' 7 <= 7 Return -EINVAL when no entry matches. The set_filter() path is reachable from userspace via the sysfs in_anglvel_filter_low_pass_3db_frequency interface, so userspace can trivially trigger the out-of-bounds read with a value that is not in bmg160_samp_freq_table[].filter.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 22b46c45fb9be8ec1fcb4d9b74810e6a20ff67cc before 1dc3a833be11e5d503038e3c701745fd0e03903c; affected 22b46c45fb9be8ec1fcb4d9b74810e6a20ff67cc before 77e56ebb1786f4296afd5fa46975a989b285ae65; affected 22b46c45fb9be8ec1fcb4d9b74810e6a20ff67cc before 029481cddb98697716f4bf3021d035eaf2ca0e1f; affected 22b46c45fb9be8ec1fcb4d9b74810e6a20ff67cc before 8d202515baea4e2e3be448d1590099af28f2346d; affected 22b46c45fb9be8ec1fcb4d9b74810e6a20ff67cc before d85ee50f58dd83fe74f6d0bf8bd345c657b216e8; affected 22b46c45fb9be8ec1fcb4d9b74810e6a20ff67cc before 7bbf02b63961fc1768c9c654392c11f2077d4c59; affected 22b46c45fb9be8ec1fcb4d9b74810e6a20ff67cc before 6c8675468862161d1c59130266852b66867d3861; affected 22b46c45fb9be8ec1fcb4d9b74810e6a20ff67cc before 8320c77e67382d5d55d77043a5f60a867d408a2b |
| Linux / Linux | affected 3.18; unaffected 0 before 3.18; 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/1dc3a833be11e5d503038e3c701745fd0e03903c
- https://git.kernel.org/stable/c/77e56ebb1786f4296afd5fa46975a989b285ae65
- https://git.kernel.org/stable/c/029481cddb98697716f4bf3021d035eaf2ca0e1f
- https://git.kernel.org/stable/c/8d202515baea4e2e3be448d1590099af28f2346d
- https://git.kernel.org/stable/c/d85ee50f58dd83fe74f6d0bf8bd345c657b216e8
- https://git.kernel.org/stable/c/7bbf02b63961fc1768c9c654392c11f2077d4c59
- https://git.kernel.org/stable/c/6c8675468862161d1c59130266852b66867d3861
- https://git.kernel.org/stable/c/8320c77e67382d5d55d77043a5f60a867d408a2b