CVE-2025-71197
Description
In the Linux kernel, the following vulnerability has been resolved: w1: therm: Fix off-by-one buffer overflow in alarms_store The sysfs buffer passed to alarms_store() is allocated with 'size + 1' bytes and a NUL terminator is appended. However, the 'size' argument does not account for this extra byte. The original code then allocated 'size' bytes and used strcpy() to copy 'buf', which always writes one byte past the allocated buffer since strcpy() copies until the NUL terminator at index 'size'. Fix this by parsing the 'buf' parameter directly using simple_strtoll() without allocating any intermediate memory or string copying. This removes the overflow while simplifying the code.
How to fix
- Linux Linux49ff9b4b9deacbefa6654a0a2bcaf910c9de7e95, 060b08d72a38b158a7f850d4b83c17c2969e0f6b, b3fc3e1f04dcc7c41787bbf08a6e0d2728e022cf, 6a5820ecfa5a76c3d3e154802c8c15f391ef442e, 6fd6d2a8e41b7f544a4d26cbd60bedf9c67893a0, e6b2609af21b5cccc9559339591b8a2cbf884169, 761fcf46a1bd797bd32d23f3ea0141ffd437668a or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | e2c94d6f572079511945e64537eb1218643f2e68 ≤ v < 49ff9b4b9deacbefa6654a0a2bcaf910c9de7e95, e2c94d6f572079511945e64537eb1218643f2e68 ≤ v < 060b08d72a38b158a7f850d4b83c17c2969e0f6b, e2c94d6f572079511945e64537eb1218643f2e68 ≤ v < b3fc3e1f04dcc7c41787bbf08a6e0d2728e022cf, e2c94d6f572079511945e64537eb1218643f2e68 ≤ v < 6a5820ecfa5a76c3d3e154802c8c15f391ef442e, e2c94d6f572079511945e64537eb1218643f2e68 ≤ v < 6fd6d2a8e41b7f544a4d26cbd60bedf9c67893a0, e2c94d6f572079511945e64537eb1218643f2e68 ≤ v < e6b2609af21b5cccc9559339591b8a2cbf884169, e2c94d6f572079511945e64537eb1218643f2e68 ≤ v < 761fcf46a1bd797bd32d23f3ea0141ffd437668a, 5.8 | 49ff9b4b9deacbefa6654a0a2bcaf910c9de7e95, 060b08d72a38b158a7f850d4b83c17c2969e0f6b, b3fc3e1f04dcc7c41787bbf08a6e0d2728e022cf, 6a5820ecfa5a76c3d3e154802c8c15f391ef442e, 6fd6d2a8e41b7f544a4d26cbd60bedf9c67893a0, e6b2609af21b5cccc9559339591b8a2cbf884169, 761fcf46a1bd797bd32d23f3ea0141ffd437668a |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.