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TI-2026-17824 Aliases CVE-2026-22214GHSA-rfq2-gv2r-vgjg

RIOT OS <= 2026.01-devel-317 Stack-Based Buffer Overflow in ethos Serial Frame Parser

Priority MEDIUM 63CWE-121Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

RIOT OS versions up to and including 2026.01-devel-317 contain a stack-based buffer overflow vulnerability in the ethos utility due to missing bounds checking when processing incoming serial frame data. The vulnerability occurs in the _handle_char() function, where incoming frame bytes are appended to a fixed-size stack buffer without verifying that the current write index remains within bounds. An attacker capable of sending crafted serial or TCP-framed input can cause the current write index to exceed the buffer size, resulting in a write past the end of the stack buffer. This condition leads to memory corruption and application crash.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00464 40th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
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
RIOTRIOT OSup to 2026.01-devel-317—No fix listedCNA
  • RIOT OS VendorRIOT Affected up to 2026.01-devel-317 Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:riot-os:riot:*:*:*:*:*:*:*:*before 2025.10VulnerableRIOT-OS
cpe:2.3:o:riot-os:riot:2026.01:devel:*:*:*:*:*:*2026.01 develVulnerableRIOT-OS
cpe:2.3:o:riot-os:riot:2026.01:rc1:*:*:*:*:*:*2026.01 rc1VulnerableRIOT-OS
  • cpe:2.3:o:riot-os:riot:*:*:*:*:*:*:*:* Versions before 2025.10 Vulnerable ·RIOT-OS
  • cpe:2.3:o:riot-os:riot:2026.01:devel:*:*:*:*:*:* Versions 2026.01 devel Vulnerable ·RIOT-OS
  • cpe:2.3:o:riot-os:riot:2026.01:rc1:*:*:*:*:*:* Versions 2026.01 rc1 Vulnerable ·RIOT-OS

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-22214
  2. 2026-10-03 Alias added: GHSA-rfq2-gv2r-vgjg

References

Exploit 1

Other 2

  • TI-2024-21112 Buffer overflows in RIOT CVSS 3.1CRITICAL 9.8
  • TI-2023-16843 RIOT-OS vulnerable to Out of Bounds Write in _rbuf_add CVSS 3.1CRITICAL 9.8
  • TI-2023-10319 RIOT-OS vulnerable to Buffer Overflow during IPHC receive CVSS 3.1CRITICAL 9.8
  • TI-2026-22079 RIOT has an Out-of-Bounds Write in nanoCoAP Handler CVSS 3.1CRITICAL 9.8
  • TI-2023-16842 RIOT-OS vulnerable to Race Condition in SFR Timeout CVSS 3.1HIGH 7.5
  • TI-2023-16841 RIOT-OS vulnerable to NULL pointer dereference during NHC encoding CVSS 3.1HIGH 7.5
See all 39 →

Sources

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