EIP-2026-103367

PRE-CVE

macOS XNU - Missing Locking in checkdirs_callback() Enables Race with fchdir_common()

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-103367. PoCs published by Google Security Research.

AI-analyzed exploit summary This exploit demonstrates a race condition in macOS XNU kernel's checkdirs() function, leading to reference count underflow or dangling pointer issues when mounting filesystems. The PoC uses dtrace to widen the race window and trigger the vulnerability.

Description

macOS XNU - Missing Locking in checkdirs_callback() Enables Race with fchdir_common()

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · textdosmacos
https://www.exploit-db.com/exploits/47592

This exploit demonstrates a race condition in macOS XNU kernel's checkdirs() function, leading to reference count underflow or dangling pointer issues when mounting filesystems. The PoC uses dtrace to widen the race window and trigger the vulnerability.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Complex
Reliability
Racy
Target: macOS XNU kernel (unspecified version)
Auth required
Prerequisites: SIP disabled · root access for dtrace · FAT32 filesystem image
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026