Skip to content
Noroxi
NVD / CVE Program· CNA Linux

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

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.16% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 05440320ea3e249d5f984918f2bf51210c1a7c03, 088c5098ec6d6b0396edfbf3dad3e81de8469c1c, 0b67c8fc10b13a9090340c5f8a37d308f4e1571c.

Low priority for now. Upgrade to Linux Linux 05440320ea3e249d5f984918f2bf51210c1a7c03, 088c5098ec6d6b0396edfbf3dad3e81de8469c1c, 0b67c8fc10b13a9090340c5f8a37d308f4e1571c or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Nov 12, 2025
Updated
Oct 19, 2026
EPSS
0.1% · 6th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-40112

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • bfc8be6593097cb074d3912ba2f27565cfbb7d6e, a15859f9d8396cce7c55ccdb7e75f70f14cbc349, 4.9affected
    • 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e and later · before 05440320ea3e249d5f984918f2bf51210c1a7c03affected · git
    • 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e and later · before 7823fc4d8ab5e57f8db7806ff2530c03c166c4bbaffected · git
    • 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e and later · before 37547d8e6eba87507279ee3dfddfd9dc46335454affected · git
    • 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e and later · before a365ee556e45f780ee322b349a06efdad0c1458faffected · git
    • 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e and later · before 8cdeb5e482d3fdce7e825444b6ca3865e24c0228affected · git
    • 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e and later · before a90ce516a73dbe087f9bf3dbf311301a58d125c6affected · git
    • 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e and later · before 088c5098ec6d6b0396edfbf3dad3e81de8469c1caffected · git
    • 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e and later · before 0b67c8fc10b13a9090340c5f8a37d308f4e1571caffected · git
    • 4.4.34 and later · before 4.5affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.158-16.1.158-1
Debian:13linuxbefore 6.12.57-16.12.57-1
Debian:14linuxbefore 6.17.6-16.17.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2025-40110Nov 12, 2025 · drm/vmwgfx: Fix a null-ptr access in the cursor snooper
    0Monitor
  • ← EarlierCVE-2025-40111Nov 12, 2025 · drm/vmwgfx: Fix Use-after-free in validation
    31Monitor
  • Later →CVE-2025-40113Nov 12, 2025 · remoteproc: qcom: pas: Shutdown lite ADSP DTB on X1E
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux05440320ea3e249d5f984918f2bf51210c1a7c03Vendor (CNA)
Linux Linux088c5098ec6d6b0396edfbf3dad3e81de8469c1cVendor (CNA)
Linux Linux0b67c8fc10b13a9090340c5f8a37d308f4e1571cVendor (CNA)
Linux Linux37547d8e6eba87507279ee3dfddfd9dc46335454Vendor (CNA)
Linux Linux4.5Vendor (CNA)
Linux Linux4.9Vendor (CNA)
Linux Linux7823fc4d8ab5e57f8db7806ff2530c03c166c4bbVendor (CNA)
Linux Linux8cdeb5e482d3fdce7e825444b6ca3865e24c0228Vendor (CNA)
Linux Linuxa365ee556e45f780ee322b349a06efdad0c1458fVendor (CNA)
Linux Linuxa90ce516a73dbe087f9bf3dbf311301a58d125c6Vendor (CNA)
debian:linux6.1.158-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records