CVE-2025-40126sparc: fix accurate exception reporting in copy_{from_to}_user for UltraSPARC
- —Not scoredno CVSS score yet
- 0.23%Exploitation in 30 daysEPSS · top 86% 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: sparc: fix accurate exception reporting in copy_{from_to}_user for UltraSPARC The referenced commit introduced exception handlers on user-space memory references in copy_from_user and copy_to_user. These handlers return from the respective function and calculate the remaining bytes left to copy using the current register contents. This commit fixes a couple of bad calculations. This will fix the return value of copy_from_user and copy_to_user in the faulting case. The behaviour of memcpy stays unchanged.
Timeline
ID reserved
By Linux
- 7 months later
· 7 months later
Published
- 6 months later
· 6 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)
- 0.23% · top 86% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada – < 0bf3dc3a2156f1c5ddaba4b85d09767874634114
- affected cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada – < 41c18baee66134e6ef786eb075c1b6adb22432b0
- affected cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada – < 59424dc0d0e044b2eb007686a4724ddd91d57db5
- affected cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada – < 9b137f277cc3297044aabd950f589e505d30104c
- affected cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada – < 674ff598148a28bae0b5372339de56f2abf0b1d1
- affected cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada – < 7de3a75bbc8465d816336c74d50109e73501efab
- affected cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada – < 57c278500fce3cd4e1c540700c0b05426a958393
- affected cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada – < 4fba1713001195e59cfc001ff1f2837dab877efb
- affected 1731d90d8a558ecb20cdee0c2c001ae8e15c251d
- affected b0580eadc19ff3a617a7d07cfaf2a985153c114e
- affected 4.4.34 – < 4.5
- affected 4.8.10 – < 4.9
- affected 4.9
- unaffected < 4.9
- unaffected 5.4.301 – ≤ 5.4.*
- unaffected 5.10.246 – ≤ 5.10.*
- unaffected 5.15.195 – ≤ 5.15.*
- unaffected 6.1.156 – ≤ 6.1.*
- unaffected 6.6.112 – ≤ 6.6.*
- unaffected 6.12.53 – ≤ 6.12.*
- unaffected 6.17.3 – ≤ 6.17.*
- unaffected 6.18 – ≤ *
References
References8
- https://git.kernel.org/stable/c/0bf3dc3a2156f1c5ddaba4b85d09767874634114 (opens in a new tab)
- https://git.kernel.org/stable/c/41c18baee66134e6ef786eb075c1b6adb22432b0 (opens in a new tab)
- https://git.kernel.org/stable/c/59424dc0d0e044b2eb007686a4724ddd91d57db5 (opens in a new tab)
- https://git.kernel.org/stable/c/9b137f277cc3297044aabd950f589e505d30104c (opens in a new tab)
- https://git.kernel.org/stable/c/674ff598148a28bae0b5372339de56f2abf0b1d1 (opens in a new tab)
- https://git.kernel.org/stable/c/7de3a75bbc8465d816336c74d50109e73501efab (opens in a new tab)
- https://git.kernel.org/stable/c/57c278500fce3cd4e1c540700c0b05426a958393 (opens in a new tab)
- https://git.kernel.org/stable/c/4fba1713001195e59cfc001ff1f2837dab877efb (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-2025-124957 (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-2025-40126)Record last updated .