CVE-2026-72396 hwmon: adm1275: Prevent reading uninitialized stack
A local attacker with hardware access can read uninitialized kernel stack memory via the adm1275 hardware monitoring driver due to missing null termination.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-72396?
CVE-2026-72396 is a vulnerability in Linux, published on 15 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-72396?
How do I fix CVE-2026-72396?
Apply the vendor's patch.
Is CVE-2026-72396 being exploited?
There is no known exploitation of CVE-2026-72396 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-72396, DEBIAN-CVE-2026-72396, GHSA-xgwj-fj27-7g4m, UBUNTU-CVE-2026-72396.