CVE-2025-40126
sparc: fix accurate exception reporting in copy_{from_to}_user for UltraSPARC
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Nov 12, 2025 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada < 0bf3dc3a2156f1c5ddaba4b85d09767874634114 cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada < 41c18baee66134e6ef786eb075c1b6adb22432b0 cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada < 59424dc0d0e044b2eb007686a4724ddd91d57db5 cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada < 9b137f277cc3297044aabd950f589e505d30104c cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada < 674ff598148a28bae0b5372339de56f2abf0b1d1 cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada < 7de3a75bbc8465d816336c74d50109e73501efab cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada < 57c278500fce3cd4e1c540700c0b05426a958393 cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada < 4fba1713001195e59cfc001ff1f2837dab877efb 1731d90d8a558ecb20cdee0c2c001ae8e15c251d b0580eadc19ff3a617a7d07cfaf2a985153c114e
Linux / Linux
4.9
References
git.kernel.org: https://git.kernel.org/stable/c/0bf3dc3a2156f1c5ddaba4b85d09767874634114 git.kernel.org: https://git.kernel.org/stable/c/41c18baee66134e6ef786eb075c1b6adb22432b0 git.kernel.org: https://git.kernel.org/stable/c/59424dc0d0e044b2eb007686a4724ddd91d57db5 git.kernel.org: https://git.kernel.org/stable/c/9b137f277cc3297044aabd950f589e505d30104c git.kernel.org: https://git.kernel.org/stable/c/674ff598148a28bae0b5372339de56f2abf0b1d1 git.kernel.org: https://git.kernel.org/stable/c/7de3a75bbc8465d816336c74d50109e73501efab git.kernel.org: https://git.kernel.org/stable/c/57c278500fce3cd4e1c540700c0b05426a958393 git.kernel.org: https://git.kernel.org/stable/c/4fba1713001195e59cfc001ff1f2837dab877efb