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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
2026-07-15
Advisory published
2026-05-15
Advisory updated
2026-07-15

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).

Sources and references

Verified primary and authoritative sources

  • CVE-2026-34253 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-34253

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-34253 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-34253

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.