What is CVE-2023-23455?

CVE-2023-23455 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10. CVE-2023-23455 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-23455?

CVE-2023-23455 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2023-23455?

No patch is currently available for CVE-2023-23455. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2023-23455 actively exploited?

CVE-2023-23455 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-23455

Medium

atm_tc_enqueue in net/sched/sch_atm.c in the Linux kernel through 6.1.4 allows attackers to cause a denial of service because of type confusion (non-negative numbers can sometimes indicate a TC_ACT_SHOT condition rather than valid classification results).

Package Linux Kernel

Published 2023-01-12

Last modified 2025-03-20

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-843

CVE-2023-23455 is classified as CWE-843

See CWE-843 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2023-23455 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Debian Security
https://lists.debian.org/debian-lts-announce/2023/03/msg00000.html
Debian Security
https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
Debian Security
https://www.debian.org/security/2023/dsa-5324

Third Party Advisory
Openwall
https://www.openwall.com/lists/oss-security/2023/01/10/1

Mailing List Third Party Advisory
Openwall
https://www.openwall.com/lists/oss-security/2023/01/10/4

Mailing List Third Party Advisory
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a2965c7be0522eaa18808684b7b82b248515511b
Patch

Details

CVE ID CVE-2023-23455

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2023-01-12

Modified 2025-03-20

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2023-23455?

CVE-2023-23455 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . CVE-2023-23455 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-23455?

CVE-2023-23455 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2023-23455?

No patch is currently available for CVE-2023-23455. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2023-23455 actively exploited?

No — CVE-2023-23455 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.