CVE-2025-6703

transport/fc.rs: panic attempting to send MAX_DATA with value larger max varint

Published Jun 26, 2025 CVSS 4.0 · 2.3 Low EPSS < 1% KEV · Not listed
Description
Improper Input Validation vulnerability in Mozilla neqo leads to an unexploitable crash..This issue affects neqo: from 0.4.24 through 0.13.2.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-28762 Improper Input Validation vulnerability in Mozilla neqo leads to an unexploitable crash..This issue affects neqo: from 0.4.24 through 0.13.2.
History
Type Values Removed Values Added
First Time appeared Mozilla
Mozilla neqo
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:a:mozilla:neqo:*:*:*:*:*:rust:*:*
Vendors & Products Mozilla
Mozilla neqo
Metrics cvssV3_1

{'score': 3.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L'}

cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}

Type Values Removed Values Added
References
Metrics threat_severity

None

cvssV3_1

{'score': 3.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L'}

threat_severity

Low

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Improper Input Validation vulnerability in Mozilla neqo leads to an unexploitable crash..This issue affects neqo: from 0.4.24 through 0.13.2.
Title transport/fc.rs: panic attempting to send MAX_DATA with value larger max varint
Weaknesses CWE-20
References
Metrics cvssV4_0

{'score': 2.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/AU:Y/R:A/RE:L/U:Clear'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mozilla
Published
Updated
Jun 26, 2025, 12:59 PM
Reserved
Jun 26, 2025, 9:14 AM
Status
Analyzed
Published
Jun 26, 2025, 10:15 AM
Modified
Jun 17, 2026, 10:02 AM
Severity
Low
Public date
Jun 26, 2025, 9:30 AM