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TI-2026-76481 Aliases CVE-2026-112281GHSA-6rxg-9w2c-f7x4

Stack buffer overflow in libaribb24 decoder_handle_csi

Priority MEDIUM 64CWE-121Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · Low · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

libaribb24 (aribb24) through 1.0.3 contains a stack-based buffer overflow in decoder_handle_csi() in src/decoder.c. The flaw is a missing bound on CSI parameter bytes, which lets input write past a fixed 256-entry array (CWE-121). An attacker can embed a caption statement with a CSI introducer and over 256 parameter bytes in media files or broadcast streams, crashing FFmpeg or VLC or corrupting the return address. Exploitation requires user interaction (CVSS UI:P).

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

libaribb24 (aribb24) through 1.0.3 contains a stack-based buffer overflow vulnerability in decoder_handle_csi() in src/decoder.c that allows attackers to write past a fixed 256-entry array by supplying unbounded CSI parameter bytes. Attackers can embed a caption statement with a CSI introducer and over 256 parameter bytes in media files or broadcast streams to crash FFmpeg or VLC or corrupt the return address.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00197 9th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nkoriyamaaribb24up to 1.0.3—No fix listedCNA
  • aribb24 Vendornkoriyama Affected up to 1.0.3 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for libaribb24.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-19 Threatist record created from CVE-2026-112281
  2. 2026-10-19 Alias added: GHSA-6rxg-9w2c-f7x4

References

Advisory 1

Other 1

  • TI-2026-76480 Heap buffer overflow in libaribb24 parser lets crafted streams crash FFmpeg CVSS 4.0MEDIUM 6.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences