CVE-2020-29534

Public Exploit

Description

An issue was discovered in the Linux kernel before 5.9.3. io_uring takes a non-refcounted reference to the files_struct of the process that submitted a request, causing execve() to incorrectly optimize unshare_fd(), aka CID-0f2122045b94.

7.8

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.04%

Vendor Advisory kernel.org Vendor Advisory kernel.org

Affected: n/a n/a

References

Link	Tags
https://bugs.chromium.org/p/project-zero/issues/detail?id=2089	issue tracking patch exploit third party advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0f2122045b946241a9e549c2a76cea54fa58a7ff	patch vendor advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.3	patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-29534?: CVE-2020-29534 has been scored as a high severity vulnerability.
How to fix CVE-2020-29534?: To fix CVE-2020-29534, 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-2020-29534 being actively exploited in the wild?: It is possible that CVE-2020-29534 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.

This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.