What is CVE-2023-3389?

CVE-2023-3389 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 5.13 onward and patched in 6.4 and 5.10.185. CVE-2023-3389 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-3389?

CVE-2023-3389 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2023-3389?

Yes, CVE-2023-3389 has been patched. Fixed versions include 6.4 and 5.10.185. If you are running Linux kernel 5.13 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-3389 actively exploited?

CVE-2023-3389 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-2023-3389

High

A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation. Racing a io_uring cancel poll request with a linked timeout can cause a UAF in a hrtimer. We recommend upgrading past commit ef7dfac51d8ed961b742218f526bd589f3900a59 (4716c73b188566865bdd79c3a6709696a224ac04 for 5.10 stable and 0e388fce7aec40992eadee654193cad345d62663 for 5.15 stable).

Package Linux Kernel

Published 2023-06-28

Last modified 2025-02-13

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2023-3389 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 5.13, 5.10.162 and later are affected. Fixed in 6.4, 5.10.185 and their respective stable series.

Affected from

≥ 5.13 ≥ 5.10.162

Fixed in

✓ 6.4 6.4.x ✓ 5.10.185 5.10.x

References

10 total

Kernel Git
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=4716c73b188566865bdd79c3a6709696a224ac04

Mailing List Patch
Kernel Git
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.15.y&id=0e388fce7aec40992eadee654193cad345d62663

Mailing List Patch
Kernel Git
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ef7dfac51d8ed961b742218f526bd589f3900a59

Mailing List Patch
Kernel
https://kernel.dance/0e388fce7aec40992eadee654193cad345d62663

Patch
Kernel
https://kernel.dance/4716c73b188566865bdd79c3a6709696a224ac04

Patch

Showing 5 of 10 references View all on NVD

Details

CVE ID CVE-2023-3389

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2023-06-28

Modified 2025-02-13

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-3389?

CVE-2023-3389 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 5.13 onward and has been patched in 6.4 and 5.10.185. CVE-2023-3389 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-3389?

CVE-2023-3389 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2023-3389?

Yes. CVE-2023-3389 has been patched. Fixed versions include 6.4 and 5.10.185. If you are running Linux kernel 5.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-3389 actively exploited?

No. CVE-2023-3389 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.