#VU112639 Buffer overflow in Git - CVE-2025-48386

Vulnerability identifier: #VU112639

Vulnerability risk: High

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2025-48386

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Git
Client/Desktop applications / Software for system administration

Vendor: Git

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in wincred credential helper. 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.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Git: 2.43.0, 2.43.1, 2.43.2, 2.43.3, 2.43.4, 2.43.5, 2.43.6, 2.44.0, 2.44.1, 2.44.2, 2.44.3, 2.45.0, 2.45.1, 2.45.2, 2.45.3, 2.46.0, 2.46.1, 2.46.2, 2.46.3, 2.47.0, 2.47.1, 2.47.2, 2.48.0, 2.48.1, 2.49.0, 2.50.0

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External links
https://github.com/git/git/security/advisories/GHSA-4v56-3xvj-xvfr
https://lore.kernel.org/git/xmqq5xg2wrd1.fsf@gitster.g/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.