Description
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.
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HAffected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e, < 05440320ea3e249d5f984918f2bf51210c1a7c03; >= 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e, < 7823fc4d8ab5e57f8db7806ff2530c03c166c4bb; >= 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e, < 37547d8e6eba87507279ee3dfddfd9dc46335454; >= 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e, < a365ee556e45f780ee322b349a06efdad0c1458f; >= 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e, < 8cdeb5e482d3fdce7e825444b6ca3865e24c0228; >= 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e, < a90ce516a73dbe087f9bf3dbf311301a58d125c6; >= 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e, < 088c5098ec6d6b0396edfbf3dad3e81de8469c1c; >= 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e, < 0b67c8fc10b13a9090340c5f8a37d308f4e1571c; bfc8be6593097cb074d3912ba2f27565cfbb7d6e; a15859f9d8396cce7c55ccdb7e75f70f14cbc349; >= 4.4.34, < 4.5; >= 4.8.10, < 4.9 |
| Linux | Linux | 4.9 |
References
- https://git.kernel.org/stable/c/05440320ea3e249d5f984918f2bf51210c1a7c03
- https://git.kernel.org/stable/c/088c5098ec6d6b0396edfbf3dad3e81de8469c1c
- https://git.kernel.org/stable/c/0b67c8fc10b13a9090340c5f8a37d308f4e1571c
- https://git.kernel.org/stable/c/37547d8e6eba87507279ee3dfddfd9dc46335454
- https://git.kernel.org/stable/c/7823fc4d8ab5e57f8db7806ff2530c03c166c4bb
- https://git.kernel.org/stable/c/8cdeb5e482d3fdce7e825444b6ca3865e24c0228
- https://git.kernel.org/stable/c/a365ee556e45f780ee322b349a06efdad0c1458f
- https://git.kernel.org/stable/c/a90ce516a73dbe087f9bf3dbf311301a58d125c6
Timeline
- Published
- Nov 12, 2025
- Last modified
- Oct 19, 2026
- NVD status
- Deferred