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TI-2020-10246 Aliases CVE-2020-12885GHSA-jhjh-34gq-3m8c

An infinite loop was discovered in the CoAP library in Arm Mbed OS 5.15.3.

Priority LOW 35CWE-835Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-835.

Summary

An infinite loop was discovered in the CoAP library in Arm Mbed OS 5.15.3. The CoAP parser is responsible for parsing received CoAP packets. The function sn_coap_parser_options_parse_multiple_options() parses CoAP options in a while loop. This loop's exit condition is computed using the previously allocated heap memory required for storing the result of parsing multiple options. If the input heap memory calculation results in zero bytes, the loop exit condition is never met and the loop is not terminated. As a result, the packet parsing function never exits, leading to resource consumption.

Why it matters now

EPSS 0.01235 69th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:arm:mbed_os:5.15.3:*:*:*:*:*:*:*5.15.3VulnerableArm
  • cpe:2.3:o:arm:mbed_os:5.15.3:*:*:*:*:*:*:* Versions 5.15.3 Vulnerable ·Arm

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-12885
  2. 2026-10-03 Alias added: GHSA-jhjh-34gq-3m8c

References

Advisory 2

  • TI-2024-32659 An issue was discovered in MBed OS 6.16.0. CVSS 3.1CRITICAL 9.8
  • TI-2020-10244 Buffer over-reads were discovered in the CoAP library in Arm Mbed OS 5.15.3. CVSS 3.1CRITICAL 9.1
  • TI-2020-10247 A buffer over-read was discovered in the CoAP library in Arm Mbed OS 5.15.3. CVSS 3.1CRITICAL 9.1
  • TI-2020-10245 A buffer over-read was discovered in the CoAP library in Arm Mbed OS 5.15.3. CVSS 3.1CRITICAL 9.1
  • TI-2024-15175 Buffer Overflow vulnerability in ARM mbed-os v.6.17.0 allows a remote attacker to execute… CVSS 3.1HIGH 7.0

Sources

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