CVE-2025-0913

Inconsistent handling of O_CREATE|O_EXCL on Unix and Windows in os in syscall

Description

os.OpenFile(path, os.O_CREATE|O_EXCL) behaved differently on Unix and Windows systems when the target path was a dangling symlink. On Unix systems, OpenFile with O_CREATE and O_EXCL flags never follows symlinks. On Windows, when the target path was a symlink to a nonexistent location, OpenFile would create a file in that location. OpenFile now always returns an error when the O_CREATE and O_EXCL flags are both set and the target path is a symlink.

5.5

CVSS

Severity: Medium

CVSS 3.1 •

EPSS 0.01%

Affected: Go standard library syscall

Affected: Go standard library os

References

Link	Tags
https://go.dev/cl/672396
https://go.dev/issue/73702
https://groups.google.com/g/golang-announce/c/ufZ8WpEsA3A
https://pkg.go.dev/vuln/GO-2025-3750

Frequently Asked Questions

What is the severity of CVE-2025-0913?: CVE-2025-0913 has been scored as a medium severity vulnerability.
How to fix CVE-2025-0913?: To fix CVE-2025-0913, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-0913 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-0913 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-0913?: CVE-2025-0913 affects Go standard library syscall, Go standard library os.

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