CVE-2020-29373 Path traversal in n/a

What is CVE-2020-29373?

CVE-2020-29373 is a medium-severity path traversal vulnerability in Linux kernel, published on 28 Nov 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-22

Which versions are affected by CVE-2020-29373?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2020-29373?

Apply the vendor's patch.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2020-29373 being exploited?

There is no known exploitation of CVE-2020-29373 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2020-29373, GHSA-gv63-32vm-56hx, UBUNTU-CVE-2020-29373.