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NVD / CVE Program· CNA Linux

CVE-2025-40020: can: peak_usb: fix shift-out-of-bounds issue

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 176c81cbf9c4e348610a421aad800087c0401f60, 17edec1830e48c0becd61642d0e40bc753243b16, 394c58017e5f41043584c345106cae16a4613710; azl3 kernel 6.6.104.2-4 on Azure Linux 3.0 6.6.112.1-2.

Low priority for now. Upgrade to Linux Linux 176c81cbf9c4e348610a421aad800087c0401f60, 17edec1830e48c0becd61642d0e40bc753243b16, 394c58017e5f41043584c345106cae16a4613710; azl3 kernel 6.6.104.2-4 on Azure Linux 3.0 6.6.112.1-2 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: can: peak_usb: fix shift-out-of-bounds issue Explicitly uses a 64-bit constant when the number of bits used for its shifting is 32 (which is the case for PC CAN FD interfaces supported by this driver). [mkl: update subject, apply manually]

—No exploit Fix available
Published
Oct 24, 2025
Updated
Oct 19, 2026
EPSS
0.2% · 11th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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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.

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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

    • 3.4affected
    • bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d and later · before 572c656802781cc57f4a3231eefa83547e75ed78affected · git
    • bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d and later · before 61b1dd4c614935169d12bdecc26906e37b508618affected · git
    • bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d and later · before 48822a59ecc47d353400d38b1941d3ae7591ffffaffected · git
    • bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d and later · before 176c81cbf9c4e348610a421aad800087c0401f60affected · git
    • bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d and later · before 17edec1830e48c0becd61642d0e40bc753243b16affected · git
    • bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d and later · before eb79ed970670344380e77d62f8188e8015648d94affected · git
    • bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d and later · before 394c58017e5f41043584c345106cae16a4613710affected · git
    • bb4785551f64e18b2c8bb15a3bd2b22f5ebf624d and later · before c443be70aaee42c2d1d251e0329e0a69dd96ae54affected · git
    • before 3.4not affected · 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 6.16.10-16.16.10-1

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-2025-40018Oct 24, 2025 · ipvs: Defer ip_vs_ftp unregister during netns cleanup
    31Monitor
  • ← EarlierCVE-2025-40019Oct 24, 2025 · crypto: essiv - Check ssize for decryption and in-place encryption
    0Monitor
  • Later →CVE-2025-40021Oct 24, 2025 · tracing: dynevent: Add a missing lockdown check on dynevent
    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 Linux176c81cbf9c4e348610a421aad800087c0401f60Vendor (CNA)
Linux Linux17edec1830e48c0becd61642d0e40bc753243b16Vendor (CNA)
Linux Linux394c58017e5f41043584c345106cae16a4613710Vendor (CNA)
Linux Linux48822a59ecc47d353400d38b1941d3ae7591ffffVendor (CNA)
Linux Linux572c656802781cc57f4a3231eefa83547e75ed78Vendor (CNA)
Linux Linux61b1dd4c614935169d12bdecc26906e37b508618Vendor (CNA)
Linux Linuxc443be70aaee42c2d1d251e0329e0a69dd96ae54Vendor (CNA)
Linux Linuxeb79ed970670344380e77d62f8188e8015648d94Vendor (CNA)
azl3 kernel 6.6.104.2-4 on Azure Linux 3.06.6.112.1-2 · CBL-Mariner ReleasesMicrosoft (MSRC)
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.

No history yet (it accumulates with the daily EPSS job).

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

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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✗ → ✓

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References

Show all references (7 more)

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

All records