sparc: fix accurate exception reporting in copy_{from_to}_user for Niagara
Summary
| CVE | CVE-2025-40112 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-11-12 11:15:40 UTC |
| Updated | 2026-07-30 06:24:12 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.001540000 probability, percentile 0.051340000 (date 2026-07-31)
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e 05440320ea3e249d5f984918f2bf51210c1a7c03 git | Not specified |
| CNA | Linux | Linux | affected 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e 7823fc4d8ab5e57f8db7806ff2530c03c166c4bb git | Not specified |
| CNA | Linux | Linux | affected 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e 37547d8e6eba87507279ee3dfddfd9dc46335454 git | Not specified |
| CNA | Linux | Linux | affected 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e a365ee556e45f780ee322b349a06efdad0c1458f git | Not specified |
| CNA | Linux | Linux | affected 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e 8cdeb5e482d3fdce7e825444b6ca3865e24c0228 git | Not specified |
| CNA | Linux | Linux | affected 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e a90ce516a73dbe087f9bf3dbf311301a58d125c6 git | Not specified |
| CNA | Linux | Linux | affected 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e 088c5098ec6d6b0396edfbf3dad3e81de8469c1c git | Not specified |
| CNA | Linux | Linux | affected 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e 0b67c8fc10b13a9090340c5f8a37d308f4e1571c git | Not specified |
| CNA | Linux | Linux | affected bfc8be6593097cb074d3912ba2f27565cfbb7d6e git | Not specified |
| CNA | Linux | Linux | affected a15859f9d8396cce7c55ccdb7e75f70f14cbc349 git | Not specified |
| CNA | Linux | Linux | affected 4.4.34 4.5 semver | Not specified |
| CNA | Linux | Linux | affected 4.8.10 4.9 semver | Not specified |
| CNA | Linux | Linux | affected 4.9 | Not specified |
| CNA | Linux | Linux | unaffected 4.9 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.4.301 5.4.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.246 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.195 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.156 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.112 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.53 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.17.3 6.17.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/7823fc4d8ab5e57f8db7806ff2530c03c166c4bb | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/0b67c8fc10b13a9090340c5f8a37d308f4e1571c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a90ce516a73dbe087f9bf3dbf311301a58d125c6 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/8cdeb5e482d3fdce7e825444b6ca3865e24c0228 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/37547d8e6eba87507279ee3dfddfd9dc46335454 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/088c5098ec6d6b0396edfbf3dad3e81de8469c1c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/05440320ea3e249d5f984918f2bf51210c1a7c03 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a365ee556e45f780ee322b349a06efdad0c1458f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.