CVE-2020-29373

MEDIUM

Linux Kernel < 5.6 - Path Traversal via io_uring Root Directory Handling

Title source: llm
STIX 2.1

Description

An issue was discovered in fs/io_uring.c in the Linux kernel before 5.6. It unsafely handles the root directory during path lookups, and thus a process inside a mount namespace can escape to unintended filesystem locations, aka CID-ff002b30181d.

References (3)

Core 3
Core References
Release Notes, Vendor Advisory x_refsource_misc
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6
Exploit, Issue Tracking, Third Party Advisory x_refsource_misc
https://bugs.chromium.org/p/project-zero/issues/detail?id=2011

Scores

CVSS v3 6.5
EPSS 0.0051
EPSS Percentile 39.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Details

CWE
CWE-22
Status published
Products (1)
linux/linux_kernel < 5.6
Published Nov 28, 2020
Tracked Since Feb 18, 2026