CVE-2025-40126: linux

CVSS: UnknownDeferred
AliasesUBUNTU-CVE-2025-40126DEBIAN-CVE-2025-40126
Published 12-11-2025Last modified 23-05-2026
Open JSON

Vulnerability summary

CVE-2025-40126 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 12.9% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.23%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 30 · Related 29
DLA-4379-1USN-8029-1USN-8029-2USN-8029-3USN-8030-1USN-8033-1

Timeline

  1. 12-11-2025
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.23%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

+0.02 pp

From 0.21% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.23%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu153 products
  • linuxAll versions (No fix recorded) | < 5.15.0-170.180 | < 6.8.0-106.106 | < 6.17.0-14.14
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1100.107 | < 6.8.0-1050.53 | < 6.17.0-1007.7
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.158-1 | < 6.12.57-1 | < 6.17.6-1
Linux1 product
  • linux≥ cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada, < 0bf3dc3a2156f1c5ddaba4b85d09767874634114 | ≥ cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada, < 41c18baee66134e6ef786eb075c1b6adb22432b0 | ≥ cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada, < 59424dc0d0e044b2eb007686a4724ddd91d57db5 | ≥ cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada, < 9b137f277cc3297044aabd950f589e505d30104c | ≥ cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada, < 674ff598148a28bae0b5372339de56f2abf0b1d1 | ≥ cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada, < 7de3a75bbc8465d816336c74d50109e73501efab | ≥ cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada, < 57c278500fce3cd4e1c540700c0b05426a958393 | ≥ cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada, < 4fba1713001195e59cfc001ff1f2837dab877efb | 1731d90d8a558ecb20cdee0c2c001ae8e15c251d | b0580eadc19ff3a617a7d07cfaf2a985153c114e | ≥ 4.4.34, < 4.5 | ≥ 4.8.10, < 4.9 | 4.9

3 vendors · 155 products

References

41 links
Show all 41 references