Local memory corruption via byte-swap pointer arithmetic
Published Jul 17, 2026 · Updated Jul 17, 2026
Heap buffer overflow in xdgmime on little-endian Red Hat Enterprise Linux allows local users to corrupt memory via a malicious MIME magic file. In _xdg_mime_magic_parse_magic_line(), byte swapping advances the write pointer incorrectly and writes two bytes beyond the heap buffer. Exploitation requires a user to install the crafted file in a user-writable XDG MIME data path and an application to perform MIME type detection.
Summary
What happened
Heap buffer overflow in xdgmime on little-endian Red Hat Enterprise Linux allows local users to corrupt memory via a malicious MIME magic file. In _xdg_mime_magic_parse_magic_line(), byte swapping advances the write pointer incorrectly and writes two bytes beyond the heap buffer. Exploitation requires a user to install the crafted file in a user-writable XDG MIME data path and an application to perform MIME type detection.
The record
- CVE
- CVE-2026-16118
- Published
- Jul 17, 2026
- Updated
- Jul 17, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat Enterprise Linux 10
- Classifications
- CWE-122, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 17, 2026CVE publishedPublication date reported by the CVE source.
- Jul 17, 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?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
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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