CVE-2026-25139: high-severity vulnerability in RIOT-OS RIOT
RIOT Vulnerable to Multiple Out-of-Bounds Read When Processing Received 6LoWPAN SFR Fragments
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.6%
RIOT is an open-source microcontroller operating system, designed to match the requirements of Internet of Things (IoT) devices and other embedded devices. In version 2025.10 and prior, multiple out-of-bounds read allow any unauthenticated user, with ability to send or manipulate input packets, to read adjacent memory locations, or crash a vulnerable device running the 6LoWPAN stack. The received packet is cast into a sixlowpan_sfr_rfrag_t struct and dereferenced without validating the packet is large enough to contain the struct object. At time of publication, no known patch exists.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
RIOT-OS · RIOTRelated CVEs — RIOT-OS RIOT
In the same product, most dangerous first.
CVE-2024-32017CRITICALBuffer overflows in RIOTEPSS 1.6%CVE-2024-32018HIGHIneffective size check due to assert() and buffer overflow in RIOTEPSS 1.5%CVE-2023-33975CRITICALRIOT-OS vulnerable to Out of Bounds Write in _rbuf_addEPSS 1.5%CVE-2024-31225HIGHLack of size check and buffer overflow in RIOTEPSS 1.3%CVE-2023-24818HIGHRIOT-OS vulnerable to null pointer dereference during fragment forwardingEPSS 1.2%CVE-2023-24823CRITICALRIOT-OS vulnerable to Packet Type Confusion during IPHC sendEPSS 1.0%