8.8

CVE-2026-41429

Exploit

Improper validation of NBNS name_len in arduino-esp32 NetBIOS leads to memory corruption

arduino-esp32 is an Arduino core for the ESP32, ESP32-S2, ESP32-S3, ESP32-C3, ESP32-C6 and ESP32-H2 microcontrollers. Prior to 3.3.8, there is a remotely reachable memory corruption issue in the NBNS packet handling path. When NetBIOS is enabled by calling NBNS.begin(...), the device listens on UDP port 137 and processes untrusted NBNS requests from the local network.
The request parser trusts the attacker-controlled name_len field without enforcing a bound consistent with the fixed-size destination buffers used later in the flow. This vulnerability is fixed in 3.3.8.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Espressif ≫ Arduino-esp32 Version < 3.3.8
   Espressif ≫ Esp32 Version-
   Espressif ≫ Esp32-c3 Version-
   Espressif ≫ Esp32-c6 Version-
   Espressif ≫ Esp32-h2 Version-
   Espressif ≫ Esp32-s2 Version-
   Espressif ≫ Esp32-s3 Version-
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.31% 0.222
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 8.8 2.8 5.9
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-121 Stack-based Buffer Overflow

A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

https://github.com/espressif/arduino-esp32/security/advisories/GHSA-92j9-c75g-2c5f
Vendor Advisory
Exploit