Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: hwmon: adm1275: Prevent reading uninitialized stack While adding support for the ROHM BD127X0 hot-swap controllers, sashiko reported an error in device-name comparison, which can lead to reading uninitialized stack memory. Quoting Sashiko: This is a pre-existing issue, but I noticed that just before this block in adm1275_probe(), there might be an out-of-bounds stack read: ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer); if (ret < 0) { ... } for (mid = adm1275_id; mid->name[0]; mid++) { if (!strncasecmp(mid->name, block_buffer, strlen(mid->name))) break; } Since i2c_smbus_read_block_data() reads up to 32 bytes into the uninitialized stack array block_buffer without appending a null terminator, strncasecmp() could read past the valid bytes returned in ret. For example, if the device returns a shorter string like "adm12", checking it against "adm1275" up to the length of "adm1275" will continue reading into uninitialized stack bounds. Prevent reading uninitialized memory by zeroing the stack array.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 87102808d03948c825c3bdc48316e48f6422fd7e before 57d583f069fa9d3d0c0831e34b967d1f61edae94; affected 87102808d03948c825c3bdc48316e48f6422fd7e before 82e4ab03a6ab9b87667410f5143bc484d7a62bdc; affected 87102808d03948c825c3bdc48316e48f6422fd7e before c9e04a52663bc6651c06c2427df088b751062bd6; affected 87102808d03948c825c3bdc48316e48f6422fd7e before 39a581bd64a0e91112ec8017a2dd4e70c1336e99; affected 87102808d03948c825c3bdc48316e48f6422fd7e before aa35cee30686e6be3c890bf741429c5025d55abe; affected 87102808d03948c825c3bdc48316e48f6422fd7e before 36554592e2f5cac16ff8bf73720d38a6d9ef4a20; affected 87102808d03948c825c3bdc48316e48f6422fd7e before 93b96e723bdcba6172a5814262be875abcc5d269; affected 87102808d03948c825c3bdc48316e48f6422fd7e before 553f9517813912a5ab661af5504485d96824a61c |
| Linux / Linux | affected 3.3; unaffected 0 before 3.3; 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 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/57d583f069fa9d3d0c0831e34b967d1f61edae94
- https://git.kernel.org/stable/c/82e4ab03a6ab9b87667410f5143bc484d7a62bdc
- https://git.kernel.org/stable/c/c9e04a52663bc6651c06c2427df088b751062bd6
- https://git.kernel.org/stable/c/39a581bd64a0e91112ec8017a2dd4e70c1336e99
- https://git.kernel.org/stable/c/aa35cee30686e6be3c890bf741429c5025d55abe
- https://git.kernel.org/stable/c/36554592e2f5cac16ff8bf73720d38a6d9ef4a20
- https://git.kernel.org/stable/c/93b96e723bdcba6172a5814262be875abcc5d269
- https://git.kernel.org/stable/c/553f9517813912a5ab661af5504485d96824a61c