CVE-2025-0913

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.

PUBLISHED Reserved 2025-01-30 | Published 2025-06-11 | Updated 2025-06-11 | Assigner Go

Problem types

CWE-59: Improper Link Resolution Before File Access ('Link Following')

Product status

Credits

Junyoung Park and Dong-uk Kim of KAIST Hacking Lab

References

go.dev/cl/672396

go.dev/issue/73702

groups.google.com/g/golang-announce/c/ufZ8WpEsA3A

pkg.go.dev/vuln/GO-2025-3750

cve.org (CVE-2025-0913)

nvd.nist.gov (CVE-2025-0913)

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