CVE-2020-29534

Published: Dec 3, 2020Modified: Jun 17, 2026

7.8

Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability: 1.8 / Impact: 5.9

Source: NVD

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.

Affected (3)

Products: Linux: Linux Kernel

Linux

1 product

Linux Kernel

Configuration A

3 vulnerable

Vulnerable Software	Affected Versions
Linux Linux Kernel	From 5.1 to 5.8.18
Linux Linux Kernel	From 5.9.0 to 5.9.3
Linux Linux Kernel	Version 5.10 rc1

References (6)

https://bugs.chromium.org/p/project-zero/issues/detail?id=2089

Source: cve@mitre.org

ExploitIssue TrackingPatchThird Party Advisory

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.3

Source: cve@mitre.org

PatchVendor Advisory

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0f2122045b946241a9e549c2a76cea54fa58a7ff

Source: cve@mitre.org

PatchVendor Advisory

https://bugs.chromium.org/p/project-zero/issues/detail?id=2089

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitIssue TrackingPatchThird Party Advisory

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.3

Source: af854a3a-2127-422b-91ae-364da2661108

PatchVendor Advisory

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0f2122045b946241a9e549c2a76cea54fa58a7ff

Source: af854a3a-2127-422b-91ae-364da2661108

PatchVendor Advisory

Timeline

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