What is CVE-2023-1872?

CVE-2023-1872 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 5.7 onward. CVE-2023-1872 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-1872?

CVE-2023-1872 has a CVSS score of 7.0 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2023-1872?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2023-1872 patch availability.

Is CVE-2023-1872 actively exploited?

CVE-2023-1872 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2023-1872

High

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.

Package Linux Kernel

Published 2023-04-12

Last modified 2025-02-13

CVSS version 3.1

Patch available

Not yet patched

CVSS 3.1 score

7.0

out of 10

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2023-1872 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.7 and later are affected. No fixed version recorded yet.

Affected from

≥ 5.7

References

5 total

Kernel Git
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=da24142b1ef9fd5d36b76e36bab328a5b27523e8

Mailing List Patch
Packet Storm
http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.html

Third Party Advisory VDB Entry
Kernel Git
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=08681391b84da27133deefaaddefd0acfa90c2be

Mailing List Product
Debian Security
https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html

Third Party Advisory
Security
https://security.netapp.com/advisory/ntap-20230601-0002/

Third Party Advisory

Details

CVE ID CVE-2023-1872

Severity High

CVSS score 7.0 / 10

CVSS version 3.1

Published 2023-04-12

Modified 2025-02-13

KEV No

Patch

Not yet patched

Package linux

Frequently asked questions

What is CVE-2023-1872?

CVE-2023-1872 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 5.7 onward . CVE-2023-1872 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-1872?

CVE-2023-1872 has a CVSS score of 7.0 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2023-1872?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2023-1872 patch availability.
Is CVE-2023-1872 actively exploited?

No. CVE-2023-1872 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.