CVE-2020-29373

Public Exploit

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.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.05%
Vendor Advisory kernel.org Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6 release notes vendor advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ff002b30181d30cdfbca316dadd099c3ca0d739c patch vendor advisory
https://bugs.chromium.org/p/project-zero/issues/detail?id=2011 issue tracking exploit third party advisory

Frequently Asked Questions

What is the severity of CVE-2020-29373?
CVE-2020-29373 has been scored as a medium severity vulnerability.
How to fix CVE-2020-29373?
To fix CVE-2020-29373, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-29373 being actively exploited in the wild?
It is possible that CVE-2020-29373 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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