CVE-2026-36355

HIGH

Realtek rtl8192cd Wi-Fi Driver - Auth Bypass

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2026-36355. PoCs published by Daniil Gordeev, totekuh.

AI-analyzed exploit summary This is a functional local privilege escalation (LPE) exploit for CVE-2026-36355, targeting the Realtek rtl819x WiFi driver SDK. It leverages missing capability checks on ioctl commands (0x89F5/0x89F6) to achieve arbitrary kernel read/write, auto-detects task_struct offsets, and overwrites credentials to gain root.

Description

The rtl8192cd Wi-Fi kernel driver in the Realtek rtl819x Jungle SDK (all known versions through v3.4.14B) does not perform any access control checks on the write_mem (ioctl 0x89F5) and read_mem (ioctl 0x89F6) debug handlers, which are compiled into production builds via the unconditionally defined _IOCTL_DEBUG_CMD_ macro in 8192cd_cfg.h

Exploits (2)

exploitdb WORKING POC
by Daniil Gordeev · clocallinux
https://www.exploit-db.com/exploits/52580

This is a functional local privilege escalation (LPE) exploit for CVE-2026-36355, targeting the Realtek rtl819x WiFi driver SDK. It leverages missing capability checks on ioctl commands (0x89F5/0x89F6) to achieve arbitrary kernel read/write, auto-detects task_struct offsets, and overwrites credentials to gain root.

Classification
Working Poc 100%
Attack Type
Lpe
Complexity
Complex
Reliability
Reliable
Target: Realtek rtl819x Jungle SDK (all versions through v3.4.14B)
No auth needed
Prerequisites: Unprivileged user access · Presence of vulnerable Realtek rtl819x driver · ARM-based Linux system (tested on Linux 3.18.48)
devstral-2 · analyzed May 28, 2026 Full analysis →
github WORKING POC
by totekuh · cpoc
https://github.com/totekuh/CVE-2026-36355

The repository contains a functional exploit for CVE-2026-36355, targeting the Realtek rtl819x Jungle SDK Wi-Fi driver. The exploit leverages unauthenticated IOCTLs to achieve arbitrary kernel memory read/write, leading to local privilege escalation (LPE) from an unprivileged user to root.

Classification
Working Poc 100%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: Realtek rtl819x Jungle SDK Wi-Fi driver (all versions through v3.4.14B)
No auth needed
Prerequisites: Local access to a system with the vulnerable Realtek Wi-Fi driver loaded · Ability to open a wireless network interface
devstral-2 · analyzed May 17, 2026 Full analysis →

Scores

CVSS v3 7.7
EPSS 0.0068
EPSS Percentile 47.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-200 CWE-782 CWE-787
Status published
Published May 05, 2026
Tracked Since May 05, 2026