High 7.8Published Nov 12, 2025

CVE-2025-40112sparc: fix accurate exception reporting in copy_{from_to}_user for Niagara

Updated under an hour ago (Oct 26, 2026, 3:50 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 Niagara 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 and a broken epilogue in the exception handlers. This will prevent crashes and ensure correct return values of copy_from_user and copy_to_user in the faulting case. The behaviour of memcpy stays unchanged.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e before 05440320ea3e249d5f984918f2bf51210c1a7c03; from 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e before 7823fc4d8ab5e57f8db7806ff2530c03c166c4bb; from 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e before 37547d8e6eba87507279ee3dfddfd9dc46335454; from 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e before a365ee556e45f780ee322b349a06efdad0c1458f; from 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e before 8cdeb5e482d3fdce7e825444b6ca3865e24c0228; from 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e before a90ce516a73dbe087f9bf3dbf311301a58d125c6; from 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e before 088c5098ec6d6b0396edfbf3dad3e81de8469c1c; 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e builds before 0b67c8fc10b13a9090340c5f8a37d308f4e1571c; and 4 more ranges	CNA record

References

References

https://git.kernel.org/stable/c/05440320ea3e249d5f984918f2bf51210c1a7c03
https://git.kernel.org/stable/c/7823fc4d8ab5e57f8db7806ff2530c03c166c4bb
https://git.kernel.org/stable/c/37547d8e6eba87507279ee3dfddfd9dc46335454
https://git.kernel.org/stable/c/a365ee556e45f780ee322b349a06efdad0c1458f
https://git.kernel.org/stable/c/8cdeb5e482d3fdce7e825444b6ca3865e24c0228
https://git.kernel.org/stable/c/a90ce516a73dbe087f9bf3dbf311301a58d125c6
https://git.kernel.org/stable/c/088c5098ec6d6b0396edfbf3dad3e81de8469c1c
https://git.kernel.org/stable/c/0b67c8fc10b13a9090340c5f8a37d308f4e1571c

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.