File overwrite via temporary-name counter overflow
Published Sep 3, 2025 · Updated Jun 2, 2026
Path traversal in GLib temporary-file handling allows attackers to redirect file creation and alter data through symbolic links. In get_tmp_file(), a signed counter wraps after at least 2^31 temporary-file creations and indexes before the alphanumeric table instead of safely filling the XXXXXX template. Exploitation requires a long-running process to cross that threshold and adjacent read-only bytes to contain a usable slash, limiting the consequence to unlikely file overwrite or temporary-file exposure.
Summary
What happened
Path traversal in GLib temporary-file handling allows attackers to redirect file creation and alter data through symbolic links. In get_tmp_file(), a signed counter wraps after at least 2^31 temporary-file creations and indexes before the alphanumeric table instead of safely filling the XXXXXX template. Exploitation requires a long-running process to cross that threshold and adjacent read-only bytes to contain a usable slash, limiting the consequence to unlikely file overwrite or temporary-file exposure.
The record
- CVE
- CVE-2025-7039
- Published
- Sep 3, 2025
- Updated
- Jun 2, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat Enterprise Linux 10
- Classifications
- CWE-22
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 3, 2025CVE publishedPublication date reported by the CVE source.
- Jun 2, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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