Local IPC disclosure via permissive backing-file creation
Published Jul 21, 2026 · Updated Jul 21, 2026
Incorrect backing-file creation in Data::RadixTree::Shared before 0.02 allows local users to read shared-memory IPC data. In radix.h, open(path, O_RDWR|O_CREAT, 0666) creates a normally world-readable mmap file and follows or reuses attacker-planted paths because O_NOFOLLOW and O_EXCL are absent. Exposure requires a shared directory accessible to another local account; that account can read IPC payloads and can pre-create a file or symlink to redirect the segment.
Summary
What happened
Incorrect backing-file creation in Data::RadixTree::Shared before 0.02 allows local users to read shared-memory IPC data. In radix.h, open(path, O_RDWR|O_CREAT, 0666) creates a normally world-readable mmap file and follows or reuses attacker-planted paths because O_NOFOLLOW and O_EXCL are absent. Exposure requires a shared directory accessible to another local account; that account can read IPC payloads and can pre-create a file or symlink to redirect the segment.
The record
- CVE
- CVE-2026-65063
- Published
- Jul 21, 2026
- Updated
- Jul 21, 2026
- Vendor
- Yegor Korablev
- Product
- Data::RadixTree::Shared
- Classifications
- CWE-732, CWE-59, T1005
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 21, 2026CVE publishedPublication date reported by the CVE source.
- Jul 21, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <0.02
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What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
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Technologies
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Your stack
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