What is CVE-2023-6931?

CVE-2023-6931 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10, classified as a Out-of-bounds Write flaw (CWE-787). CVE-2023-6931 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-6931?

CVE-2023-6931 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-2023-6931?

No patch is currently available for CVE-2023-6931. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2023-6931 actively exploited?

CVE-2023-6931 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Out-of-bounds Write (CWE-787)?

The product writes data past the end or before the beginning of the intended buffer. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/787.html

CVE-2023-6931

High

A heap out-of-bounds write vulnerability in the Linux kernel's Performance Events system component can be exploited to achieve local privilege escalation. A perf_event's read_size can overflow, leading to an heap out-of-bounds increment or write in perf_read_group(). We recommend upgrading past commit 382c27f4ed28f803b1f1473ac2d8db0afc795a1b.

Package Linux Kernel

Published 2023-12-19

Last modified 2026-05-12

CVSS version 3.1

Patch available

Awaiting data

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-787

CVE-2023-6931 is a Out-of-bounds Write vulnerability

What is Out-of-bounds Write?

The product writes data past the end or before the beginning of the intended buffer. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2023-6931 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/2024/01/msg00004.html

Mailing List Third Party Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html

Mailing List Third Party Advisory
Cert-Portal
https://cert-portal.siemens.com/productcert/html/ssa-265688.html
Cert-Portal
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
Cert-Portal
https://cert-portal.siemens.com/productcert/html/ssa-613116.html
Cert-Portal
https://cert-portal.siemens.com/productcert/html/ssa-794697.html
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=382c27f4ed28f803b1f1473ac2d8db0afc795a1b
Patch
Kernel patch commit
https://kernel.dance/382c27f4ed28f803b1f1473ac2d8db0afc795a1b
Patch

Details

CVE ID CVE-2023-6931

Severity High

CVSS score 7.0 / 10

CVSS version 3.1

Published 2023-12-19

Modified 2026-05-12

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2023-6931?

CVE-2023-6931 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10 , classified as an Out-of-bounds Write flaw (CWE-787) . CVE-2023-6931 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-6931?

CVE-2023-6931 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-2023-6931?

No patch is currently available for CVE-2023-6931. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2023-6931 actively exploited?

No — CVE-2023-6931 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Out-of-bounds Write (CWE-787)?

The product writes data past the end or before the beginning of the intended buffer. View CWE-787 on MITRE CWE →