CVE-2025-71197
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.
Does this matter?
Not yet scored. NVD analysis is pending; check back once CVSS and EPSS values are published.
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.
- CVSS
- Not yet scored
- EPSS
- 0.25% probability · 17th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS 0.3% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://git.kernel.org/stable/c/060b08d72a38b158a7f850d4b83c17c2969e0f6b
- https://git.kernel.org/stable/c/49ff9b4b9deacbefa6654a0a2bcaf910c9de7e95
- https://git.kernel.org/stable/c/6a5820ecfa5a76c3d3e154802c8c15f391ef442e
- https://git.kernel.org/stable/c/6fd6d2a8e41b7f544a4d26cbd60bedf9c67893a0
- https://git.kernel.org/stable/c/761fcf46a1bd797bd32d23f3ea0141ffd437668a
- https://git.kernel.org/stable/c/b3fc3e1f04dcc7c41787bbf08a6e0d2728e022cf
- https://git.kernel.org/stable/c/e6b2609af21b5cccc9559339591b8a2cbf884169
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.