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TI-2026-56236 Aliases CVE-2026-81508

ESF-IDF: Heap Out-of-Bounds Read in Bluedroid A2DP Sink Media Packet Processing

Priority LOW 19CWE-125Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

Summary

ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In 5.5.5, 6.0.1, and 6.1, the BlueDroid A2DP sink function btc_a2dp_sink_handle_inc_media() reads a timestamp field from the received media buffer before validating that the packet layout contains the field. A paired BR/EDR audio source within radio range can send a malformed A2DP media packet to a build with BlueDroid Classic Bluetooth and A2DP sink support enabled, causing an out-of-bounds read into adjacent heap memory and limited disclosure of heap contents. Arbitrary memory disclosure and code execution are not established.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00213 11th 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
None
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
espressifesp-idf= 6.1; = 6.0.1; = 5.5.5—No fix listedCNA
  • esp-idf Vendorespressif Affected = 6.1; = 6.0.1; = 5.5.5 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:espressif:esp-idf:*:*:*:*:*:*:*:*——espressif
  • cpe:2.3:a:espressif:esp-idf:*:*:*:*:*:*:*:* Versions — — ·espressif

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-81508

References

Other 5

  • TI-2026-31061 arduino-esp32: Stack buffer overflow in WebServer multipart boundary parsing leads to remote crash potential RCE CVSS 3.1CRITICAL 9.8
  • TI-2024-30765 Multiple Poisoned Pipeline Execution (PPE) vulnerabilities CVSS 3.1CRITICAL 10.0
  • TI-2026-30028 Improper validation of NBNS name_len in arduino-esp32 NetBIOS leads to memory corruption CVSS 3.1HIGH 8.8
  • TI-2025-33484 CSRF Vulnerability in Firmware Update Endpoints Allows Remote Code Execution CVSS 4.0HIGH 8.7
  • TI-2024-22076 Buffer Overflow vulnerability in esp-idf v.5.1 allows a remote attacker to execute… CVSS 3.1MEDIUM 6.5
  • TI-2025-33011 arduino-esp32 vulnerable to CRLF injection in WebServer.cpp CVSS 4.0HIGH 8.9
See all 58 →

Sources

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