What is CVE-2023-53218?

CVE-2023-53218 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 4.11 onward and patched in 6.2.16, 6.3.3 and 6.4. CVE-2023-53218 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53218?

CVE-2023-53218 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-2023-53218?

Yes, CVE-2023-53218 has been patched. Fixed versions include 6.2.16, 6.3.3 and 6.4. If you are running Linux kernel 4.11 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53218 actively exploited?

CVE-2023-53218 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-53218

High

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Make it so that a waiting process can be aborted When sendmsg() creates an rxrpc call, it queues it to wait for a connection and channel to be assigned and then waits before it can start shovelling data as the encrypted DATA packet content includes a summary of the connection parameters. However, sendmsg() may get interrupted before a connection gets assigned and further sendmsg() calls will fail with EBUSY until an assignment is made. Fix this so that the call can at least be aborted without failing on EBUSY. We have to be careful here as sendmsg() mustn't be allowed to start the call timer if the call doesn't yet have a connection assigned as an oops may follow shortly thereafter.

Package Linux Kernel

Published 2025-09-15

Last modified 2026-01-14

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

Affected versions

Linux kernel versions 4.11 and later are affected. Fixed in 6.2.16, 6.3.3, 6.4 and their respective stable series.

Affected from

≥ 4.11

Fixed in

✓ 6.2.16 6.2.x ✓ 6.3.3 6.3.x ✓ 6.4

References

The following references provide additional information about CVE-2023-53218 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/0eb362d254814ce04848730bf32e75b8ee1a4d6c
Patch
Kernel patch commit
https://git.kernel.org/stable/c/7161cf61c64e9e9413d790f2fa2b9dada71a2249
Patch
Kernel patch commit
https://git.kernel.org/stable/c/876d96faacbc407daf4978d7ec95051b68f5344a
Patch

Details

CVE ID CVE-2023-53218

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2025-09-15

Modified 2026-01-14

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-53218?

CVE-2023-53218 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 4.11 onward and has been patched in 6.2.16, 6.3.3 and 6.4. CVE-2023-53218 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-53218?

CVE-2023-53218 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-2023-53218?

Yes — CVE-2023-53218 has been patched. Fixed versions include 6.2.16, 6.3.3 and 6.4. If you are running Linux kernel 4.11 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53218 actively exploited?

No — CVE-2023-53218 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.