CVE-2025-71197: Linux kernel · w1: therm: Fix off-by-one buffer overflow in alarms_store
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in e6b2609af21b5cccc9559339591b8a2cbf884169 : patch Linux kernel soon.
Data as of 10 Nov 2026, 13:03 UTC
Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- Patch
- Available – fixed in e6b2609af21b5cccc9559339591b8a2cbf884169, b3fc3e1f04dcc7c41787bbf08a6e0d2728e022cf, 761fcf46a1bd797bd32d23f3ea0141ffd437668a +4
Exploitation evidence
Disclosed: evidence found.
CVE published 4 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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AI-suggested
A fix is available and has been applied in the Linux kernel. Users and administrators should update to the fixed kernel versions that include the patch identified by the provided commit hashes. No additional mitigation steps are necessary once the system is updated.
Description
An off-by-one buffer overflow vulnerability was identified and fixed in the Linux kernel's w1 therm driver in the alarms_store function. The issue stemmed from improper handling of buffer size and string copying, which caused one byte to be written beyond the allocated buffer. The fix involves directly parsing the input buffer without intermediate copying, eliminating the overflow and simplifying the code.
References
- git.kernel.org/stable/c/49ff9b4b9deacbefa6654a0a2bcaf910c9de7e95 (opens in a new tab)
- git.kernel.org/stable/c/060b08d72a38b158a7f850d4b83c17c2969e0f6b (opens in a new tab)
- git.kernel.org/stable/c/b3fc3e1f04dcc7c41787bbf08a6e0d2728e022cf (opens in a new tab)
- git.kernel.org/stable/c/6a5820ecfa5a76c3d3e154802c8c15f391ef442e (opens in a new tab)
- git.kernel.org/stable/c/6fd6d2a8e41b7f544a4d26cbd60bedf9c67893a0 (opens in a new tab)
- git.kernel.org/stable/c/e6b2609af21b5cccc9559339591b8a2cbf884169 (opens in a new tab)
- git.kernel.org/stable/c/761fcf46a1bd797bd32d23f3ea0141ffd437668a (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-019113.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-457936.html (opens in a new tab)