CVE-2025-40126In 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 o…
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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
- Not given
- NVD analysis
- Deferred
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
No affected products are listed yet.
References
- 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
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