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5.5 Medium

CVE-2025-0913 os.OpenFile(path, os.O_CREATE|O_EXCL) behaved differently on Unix and Windows systems when the target path was a…

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.

Affected products and versions

Product Affected versions Fixed in
syscall 1.24 1.24.0-0 → < 1.24.4 1.24.4
syscall 1.23 earliest → < 1.23.10 1.23.10
os 1.24 1.24.0-0 → < 1.24.4 1.24.4
os 1.23 earliest → < 1.23.10 1.23.10

References

Timeline

  1. Published
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