CVE-2021-28153

An issue was discovered in GNOME GLib before 2.66.8. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION to replace a path that is a dangling symlink, it incorrectly also creates the target of the symlink as an empty file, which could conceivably have security relevance if the symlink is attacker-controlled. (If the path is a symlink to a file that already exists, then the contents of that file correctly remain unchanged.)

CVSS v3.1 NVD

5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v2.0 NVD

5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:P/A:N

EPSS

2.71% chance of exploitation in the next 30 days, 86th percentile

Published

2021-03-11

Updated

2026-10-14

Proof-of-concept exploits (1)

• https://gitlab.gnome.org/GNOME/glib/-/issues/2325

Security advisories

• https://lists.debian.org/debian-lts-announce/2022/06/msg00006.html
• https://security.gentoo.org/glsa/202107-13
• https://security.netapp.com/advisory/ntap-20210416-0003

References

• CVE Record
• NVD entry