PatchSiren cyber security CVE debrief
CVE-2026-34253 Xiph.Org Foundation CVE debrief
A buffer underflow vulnerability exists in the ogg123 utility from vorbis-tools 1.4.3, specifically in the remotethread function within remote.c. The flaw affects the remote control functionality and can be triggered by malformed input, resulting in a stack buffer underflow. This vulnerability may cause application crashes and potentially enable code execution. The issue was published on 2026-05-15 and last modified on 2026-05-18. The vulnerability is currently in 'Deferred' status per NVD records.
- Vendor
- Xiph.Org Foundation
- Product
- vorbis-tools
- CVSS
- HIGH 8.2
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-05-15
- Original CVE updated
- 2026-05-18
- Advisory published
- 2026-05-15
- Advisory updated
- 2026-05-18
Who should care
Organizations using ogg123 with remote control functionality enabled, particularly in server or automated processing environments. Audio streaming services and media processing pipelines relying on vorbis-tools should prioritize patching.
Technical summary
The remotethread function in ogg123/remote.c fails to properly validate input length before writing to a stack buffer. When processing malformed remote control commands, the function can write before the buffer boundary, causing memory corruption. The vulnerability is reachable via the network-facing remote control interface without authentication.
Defensive priority
HIGH
Recommended defensive actions
- Upgrade vorbis-tools to a version newer than 1.4.3 when available
- Restrict network access to ogg123 remote control functionality
- Monitor for patches from Xiph.Org Foundation
- Apply principle of least privilege to ogg123 execution contexts
- Consider disabling remote control features if not required
Evidence notes
The vulnerability is located in the remotethread function in ogg123/remote.c at line 153. The affected version is vorbis-tools 1.4.3. The CVSS 3.1 vector indicates network attack vector with low attack complexity, no privileges required, and no user interaction needed. The weakness is classified as CWE-124 (Buffer Underwrite).
Official resources
2026-05-15