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Buffer overflow in 'wincred' credential helper

Moderate
ttaylorr published GHSA-4v56-3xvj-xvfr Jul 8, 2025

Package

No package listed

Affected versions

v2.50.0, v2.49.0, v2.48.0-v2.48.1, v2.47.0–v2.47.2, v2.46.0–v2.46.3, v2.45.0-v2.45.3, v2.44.0–v2.44.3, v2.43.6 and prior

Patched versions

>= v2.43.7, v2.44.4, v2.45.4, v2.46.4, v2.47.3, v2.48.2, v2.49.1, and v2.50.1

Description

Impact

The wincred credential helper uses a static buffer (target) as a unique key for storing and comparing against internal storage. This credential helper does not properly bounds check the available space remaining in the buffer before appending to it with wcsncat(), leading to potential buffer overflows.

Workarounds

Upgrade to the latest Git version(s), or avoid using the wincred helper in the meantime if upgrading is not possible.

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

CVE ID

CVE-2025-48386

Weaknesses

No CWEs

Credits