Not yet scoredPublished Nov 12, 2025

CVE-2025-40126sparc: fix accurate exception reporting in copy_{from_to}_user for UltraSPARC

Updated under an hour ago (Oct 27, 2026, 12:50 PM ET)

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Exploited in the last 30 days

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.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Deferred
Record last updated: May 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada before 0bf3dc3a2156f1c5ddaba4b85d09767874634114; from cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada before 41c18baee66134e6ef786eb075c1b6adb22432b0; from cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada before 59424dc0d0e044b2eb007686a4724ddd91d57db5; from cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada before 9b137f277cc3297044aabd950f589e505d30104c; from cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada before 674ff598148a28bae0b5372339de56f2abf0b1d1; from cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada before 7de3a75bbc8465d816336c74d50109e73501efab; from cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada before 57c278500fce3cd4e1c540700c0b05426a958393; from cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada before 4fba1713001195e59cfc001ff1f2837dab877efb; and 4 more ranges	CNA record

References

References

https://git.kernel.org/stable/c/0bf3dc3a2156f1c5ddaba4b85d09767874634114
https://git.kernel.org/stable/c/41c18baee66134e6ef786eb075c1b6adb22432b0
https://git.kernel.org/stable/c/59424dc0d0e044b2eb007686a4724ddd91d57db5
https://git.kernel.org/stable/c/9b137f277cc3297044aabd950f589e505d30104c
https://git.kernel.org/stable/c/674ff598148a28bae0b5372339de56f2abf0b1d1
https://git.kernel.org/stable/c/7de3a75bbc8465d816336c74d50109e73501efab
https://git.kernel.org/stable/c/57c278500fce3cd4e1c540700c0b05426a958393
https://git.kernel.org/stable/c/4fba1713001195e59cfc001ff1f2837dab877efb

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.