CVE-2026-86469

Glib2: toctou symlink race in `g_file_create_replace_destination` fallback path

CVSS 3.1 5.3 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-86469

Published

A flaw was found in GLib2. When g_file_replace() is used with G_FILE_CREATE_REPLACE_DESTINATION and creating the .goutputstream-XXXXXX temporary file fails, the library unlinks the destination and recreates it without exclusive creation or symlink protection. A local attacker who can write to the destination directory can win that race and redirect the write to another file.

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Affected versions, risk and source history

Exploitation and risk

Source status

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Advisory history

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6 Nov 2026 08:36:20 UTC