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CVE-2025-71197

UnknownEPSS 0.19%

Last modified

CVE-2025-71197 is a vulnerability of currently unknown severity. 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. EPSS estimates a 0.19% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
0.19%

8.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= e2c94d6f572079511945e64537eb1218643f2e68, < 49ff9b4b9deacbefa6654a0a2bcaf910c9de7e95; >= e2c94d6f572079511945e64537eb1218643f2e68, < 060b08d72a38b158a7f850d4b83c17c2969e0f6b; >= e2c94d6f572079511945e64537eb1218643f2e68, < b3fc3e1f04dcc7c41787bbf08a6e0d2728e022cf; >= e2c94d6f572079511945e64537eb1218643f2e68, < 6a5820ecfa5a76c3d3e154802c8c15f391ef442e; >= e2c94d6f572079511945e64537eb1218643f2e68, < 6fd6d2a8e41b7f544a4d26cbd60bedf9c67893a0; >= e2c94d6f572079511945e64537eb1218643f2e68, < e6b2609af21b5cccc9559339591b8a2cbf884169; >= e2c94d6f572079511945e64537eb1218643f2e68, < 761fcf46a1bd797bd32d23f3ea0141ffd437668a
LinuxLinux5.8

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is 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. 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 severe is CVE-2025-71197?
Severity scoring for CVE-2025-71197 is pending analysis. The EPSS model estimates a 0.19% probability of exploitation in the next 30 days.
How do I fix CVE-2025-71197?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST