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UBUNTU-CVE-2023-1872

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UBUNTU-CVE-2023-1872

Published: 12 Apr 2023Last Modified: 22 Apr 2026

Upstream:

Aliases:

Summary:

Details: A use-after-free vulnerability in the Linux Kernel io_uring system can be exploited to achieve local privilege escalation. The io_file_get_fixed function lacks the presence of ctx->uring_lock which can lead to a Use-After-Free vulnerability due a race condition with fixed files getting unregistered. We recommend upgrading past commit da24142b1ef9fd5d36b76e36bab328a5b27523e8.

References: https://ubuntu.com/security/CVE-2023-1872, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=08681391b84da27133deefaaddefd0acfa90c2be, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=da24142b1ef9fd5d36b76e36bab328a5b27523e8, https://ubuntu.com/security/notices/USN-6044-1, https://ubuntu.com/security/notices/USN-6051-1, https://ubuntu.com/security/notices/USN-6070-1, https://ubuntu.com/security/notices/USN-6107-1, https://ubuntu.com/security/notices/USN-6133-1, https://ubuntu.com/security/notices/USN-6134-1, https://www.cve.org/CVERecord?id=CVE-2023-1872, https://git.kernel.org/stable/linux-stable/c/08681391b84da27133deefaaddefd0acfa90c2be, https://git.kernel.org/stable/linux-stable/c/da24142b1ef9fd5d36b76e36bab328a5b27523e8

Affected packages

Package

Name: linux-hwe-edge

Purl: pkg:deb/ubuntu/[email protected]~16.04.1?arch=source&distro=xenial

Affected ranges

Type: ECOSYSTEM

Events:

Introduced- 0

Fixed -None

Affected versions

4.8.0-28.30~16.04.1

4.8.0-30.32~16.04.1

4.8.0-32.34~16.04.1

4.8.0-34.36~16.04.1

Common Vulnerability Scoring System

Attack Vector

Network

Adjacent

Local

Physical

Privileges Required

None

Low

High

User Interaction

None

Required

Scope

Unchanged

Changed

Confidentiality

None

Low

High

Integrity

None

Low

High

Availability

None

Low

High