CVE-2025-40126

sparc: fix accurate exception reporting in copy_{from_to}_user for UltraSPARC

State: Published
Severity: Not scored
Published: Nov 12, 2025
Updated: May 23, 2026
Reserved: Apr 16, 2025

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada to before 0bf3dc3a2156f1c5ddaba4b85d09767874634114Affected cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada to before 41c18baee66134e6ef786eb075c1b6adb22432b0Affected cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada to before 59424dc0d0e044b2eb007686a4724ddd91d57db5Affected cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada to before 9b137f277cc3297044aabd950f589e505d30104cAffected cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada to before 674ff598148a28bae0b5372339de56f2abf0b1d1Affected cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada to before 7de3a75bbc8465d816336c74d50109e73501efabAffected cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada to before 57c278500fce3cd4e1c540700c0b05426a958393Affected cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada to before 4fba1713001195e59cfc001ff1f2837dab877efbAffected 1731d90d8a558ecb20cdee0c2c001ae8e15c251dAffected b0580eadc19ff3a617a7d07cfaf2a985153c114eAffected 4.4.34 to before 4.5Affected 4.8.10 to before 4.9Affected
LinuxLinux	4.9Affected before 4.9Not affected 5.4.301 through 5.4.Not affected 5.10.246 through 5.10.Not affected 5.15.195 through 5.15.Not affected 6.1.156 through 6.1.Not affected 6.6.112 through 6.6.Not affected 6.12.53 through 6.12.Not affected 6.17.3 through 6.17.*Not affected 6.18 and laterNot affected

Product

Versions

LinuxLinux

cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada to before 0bf3dc3a2156f1c5ddaba4b85d09767874634114Affected
cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada to before 41c18baee66134e6ef786eb075c1b6adb22432b0Affected
cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada to before 59424dc0d0e044b2eb007686a4724ddd91d57db5Affected
cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada to before 9b137f277cc3297044aabd950f589e505d30104cAffected
cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada to before 674ff598148a28bae0b5372339de56f2abf0b1d1Affected
cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada to before 7de3a75bbc8465d816336c74d50109e73501efabAffected
cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada to before 57c278500fce3cd4e1c540700c0b05426a958393Affected
cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada to before 4fba1713001195e59cfc001ff1f2837dab877efbAffected
1731d90d8a558ecb20cdee0c2c001ae8e15c251dAffected
b0580eadc19ff3a617a7d07cfaf2a985153c114eAffected
4.4.34 to before 4.5Affected
4.8.10 to before 4.9Affected

LinuxLinux

4.9Affected
before 4.9Not affected
5.4.301 through 5.4.*Not affected
5.10.246 through 5.10.*Not affected
5.15.195 through 5.15.*Not affected
6.1.156 through 6.1.*Not affected
6.6.112 through 6.6.*Not affected
6.12.53 through 6.12.*Not affected
6.17.3 through 6.17.*Not affected
6.18 and laterNot affected

References

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