CVE-2025-40126

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

No CVSS.

References

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

Configurations

No configuration.

History

No history.

Information

Published : 2025-11-12 11:15

Updated : 2026-06-17 09:21

NVD link : CVE-2025-40126

Mitre link : CVE-2025-40126

CVE.ORG link : CVE-2025-40126

JSON object : View

Products Affected

No product.

CWE

No CWE.

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These handlers return from\nthe respective function and calculate the remaining bytes left to copy\nusing the current register contents. This commit fixes a couple of bad\ncalculations. This will fix the return value of copy_from_user and\ncopy_to_user in the faulting case. The behaviour of memcpy stays unchanged."}], "lastModified": "2026-06-17T09:21:18.533", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}