CVE-2025-71197w1: therm: Fix off-by-one buffer overflow in alarms_store
- —Not scoredno CVSS score yet
- 0.26%Exploitation in 30 daysEPSS · top 82% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 4 days later
· 4 days later
Published
- 9 months later
· 9 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Deferred.
- EPSS (exploitation in 30 days)
- 0.26% · top 82% of all CVEs (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected e2c94d6f572079511945e64537eb1218643f2e68 – < 49ff9b4b9deacbefa6654a0a2bcaf910c9de7e95
- affected e2c94d6f572079511945e64537eb1218643f2e68 – < 060b08d72a38b158a7f850d4b83c17c2969e0f6b
- affected e2c94d6f572079511945e64537eb1218643f2e68 – < b3fc3e1f04dcc7c41787bbf08a6e0d2728e022cf
- affected e2c94d6f572079511945e64537eb1218643f2e68 – < 6a5820ecfa5a76c3d3e154802c8c15f391ef442e
- affected e2c94d6f572079511945e64537eb1218643f2e68 – < 6fd6d2a8e41b7f544a4d26cbd60bedf9c67893a0
- affected e2c94d6f572079511945e64537eb1218643f2e68 – < e6b2609af21b5cccc9559339591b8a2cbf884169
- affected e2c94d6f572079511945e64537eb1218643f2e68 – < 761fcf46a1bd797bd32d23f3ea0141ffd437668a
- affected 5.8
- unaffected < 5.8
- unaffected 5.10.249 – ≤ 5.10.*
- unaffected 5.15.199 – ≤ 5.15.*
- unaffected 6.1.162 – ≤ 6.1.*
- unaffected 6.6.122 – ≤ 6.6.*
- unaffected 6.12.68 – ≤ 6.12.*
- unaffected 6.18.8 – ≤ 6.18.*
- unaffected 6.19 – ≤ *
References
References9
- https://git.kernel.org/stable/c/49ff9b4b9deacbefa6654a0a2bcaf910c9de7e95 (opens in a new tab)
- https://git.kernel.org/stable/c/060b08d72a38b158a7f850d4b83c17c2969e0f6b (opens in a new tab)
- https://git.kernel.org/stable/c/b3fc3e1f04dcc7c41787bbf08a6e0d2728e022cf (opens in a new tab)
- https://git.kernel.org/stable/c/6a5820ecfa5a76c3d3e154802c8c15f391ef442e (opens in a new tab)
- https://git.kernel.org/stable/c/6fd6d2a8e41b7f544a4d26cbd60bedf9c67893a0 (opens in a new tab)
- https://git.kernel.org/stable/c/e6b2609af21b5cccc9559339591b8a2cbf884169 (opens in a new tab)
- https://git.kernel.org/stable/c/761fcf46a1bd797bd32d23f3ea0141ffd437668a (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-206800 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-71197)Record last updated .