Description
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 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
22b46c45fb9be8ec1fcb4d9b74810e6a20ff67cc to < 1dc3a833be11e5d503038e3c701745fd0e03903caffected22b46c45fb9be8ec1fcb4d9b74810e6a20ff67cc to < 77e56ebb1786f4296afd5fa46975a989b285ae65affected22b46c45fb9be8ec1fcb4d9b74810e6a20ff67cc to < 029481cddb98697716f4bf3021d035eaf2ca0e1faffected22b46c45fb9be8ec1fcb4d9b74810e6a20ff67cc to < 8d202515baea4e2e3be448d1590099af28f2346daffected22b46c45fb9be8ec1fcb4d9b74810e6a20ff67cc to < d85ee50f58dd83fe74f6d0bf8bd345c657b216e8affected22b46c45fb9be8ec1fcb4d9b74810e6a20ff67cc to < 7bbf02b63961fc1768c9c654392c11f2077d4c59affected22b46c45fb9be8ec1fcb4d9b74810e6a20ff67cc to < 6c8675468862161d1c59130266852b66867d3861affected22b46c45fb9be8ec1fcb4d9b74810e6a20ff67cc to < 8320c77e67382d5d55d77043a5f60a867d408a2baffected
Linux Linux
Default version status: affected
3.18affected0 to < 3.18unaffected5.10.261 to ≤ 5.10.*unaffected5.15.212 to ≤ 5.15.*unaffected6.1.178 to ≤ 6.1.*unaffected6.6.145 to ≤ 6.6.*unaffected6.12.96 to ≤ 6.12.*unaffected6.18.39 to ≤ 6.18.*unaffected7.1.4 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
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 ↗