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CVE-2025-71197 In the Linux kernel, the following vulnerability has been resolved: w1: therm: Fix off-by-one buffer overflow in…

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.

Affected products and versions

Product Affected versions Fixed in
Linux 6.19 earliest → < 6.19 6.19
Linux 6.18 earliest → < 6.18.8 6.18.8
Linux 6.12 earliest → < 6.12.68 6.12.68
Linux 6.6 earliest → < 6.6.122 6.6.122
Linux 6.1 earliest → < 6.1.162 6.1.162
Linux 5.15 earliest → < 5.15.199 5.15.199
Linux 5.10 earliest → < 5.10.249 5.10.249
Linux 5.8 No fix stated
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1 3.1.7 → latest No fix stated
Show the 2 other branches
Product Affected versions Fixed in
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1 3.1.7 → latest No fix stated
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1 3.1.7 → latest No fix stated

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