Player crash via empty-input stack underwrite
Published May 15, 2026 · Updated May 15, 2026
Buffer underflow in Xiph.Org vorbis-tools 1.4.3 ogg123 allows local users to crash the player via empty remote-control input. The remotethread function calls fgets into a stack buffer, then unconditionally writes a terminator at strlen(buf)-1; a failed or empty read makes that index negative. The flaw is reached only through ogg123's stdin-based remote interface; the source establishes a write before the buffer and a crash but does not demonstrate code execution.
Summary
What happened
Buffer underflow in Xiph.Org vorbis-tools 1.4.3 ogg123 allows local users to crash the player via empty remote-control input. The remotethread function calls fgets into a stack buffer, then unconditionally writes a terminator at strlen(buf)-1; a failed or empty read makes that index negative. The flaw is reached only through ogg123's stdin-based remote interface; the source establishes a write before the buffer and a crash but does not demonstrate code execution.
The record
- CVE
- CVE-2026-34253
- Published
- May 15, 2026
- Updated
- May 15, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-124
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 15, 2026CVE publishedPublication date reported by the CVE source.
- May 15, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
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Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
- Malformed remote-control input proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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