CVE-2026-22213Public exploit

Local tapslip6 crash via unbounded device path

Published Jan 12, 2026 · Updated Jan 12, 2026

Stack-based buffer overflow in RIOT OS 2026.01-devel-317 and earlier allows local users to crash tapslip6 through its -s option. The devopen() function copies the fixed /dev/ prefix and appends the supplied device name into a 1,024-byte stack buffer with strcpy() and strcat() but performs no length check. Exploitation requires local access and control of the utility's command line; an overlong device name corrupts stack memory and terminates the process.

CVSS severity2.4
Low
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in RIOT OS 2026.01-devel-317 and earlier allows local users to crash tapslip6 through its -s option. The devopen() function copies the fixed /dev/ prefix and appends the supplied device name into a 1,024-byte stack buffer with strcpy() and strcat() but performs no length check. Exploitation requires local access and control of the utility's command line; an overlong device name corrupts stack memory and terminates the process.

The record

CVE
CVE-2026-22213
Published
Jan 12, 2026
Updated
Jan 12, 2026
Vendor
RIOT-OS
Product
RIOT
Classifications
CWE-121, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=2026.01-devel-317

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

RIOT-OS · RIOTversion=0 <=2026.01-devel-317

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
2.4VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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