What is CVE-2023-3611?

CVE-2023-3611 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Out-of-bounds Write flaw (CWE-787), affecting Linux kernel versions from 3.8 onward and patched in 6.5. CVE-2023-3611 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-3611?

CVE-2023-3611 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-2023-3611?

Yes, CVE-2023-3611 has been patched. Fixed versions include 6.5. If you are running Linux kernel 3.8 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-3611 actively exploited?

CVE-2023-3611 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-2023-3611

High

An out-of-bounds write vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to achieve local privilege escalation. The qfq_change_agg() function in net/sched/sch_qfq.c allows an out-of-bounds write because lmax is updated according to packet sizes without bounds checks. We recommend upgrading past commit 3e337087c3b5805fe0b8a46ba622a962880b5d64.

Package Linux Kernel

Published 2023-07-21

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-787

CVE-2023-3611 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

Affected versions

Linux kernel versions 3.8 and later are affected. Fixed in 6.5 and their respective stable series.

Affected from

≥ 3.8

Fixed in

✓ 6.5 6.5.x

References

7 total

Kernel Git
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e337087c3b5805fe0b8a46ba622a962880b5d64

Mailing List Patch Vendor Advisory
Kernel
https://kernel.dance/3e337087c3b5805fe0b8a46ba622a962880b5d64

Patch Vendor Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html

Mailing List Third Party Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html

Mailing List
Security
https://security.netapp.com/advisory/ntap-20230908-0002/

Third Party Advisory

Showing 5 of 7 references View all on NVD

Details

CVE ID CVE-2023-3611

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2023-07-21

Modified 2025-02-13

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-3611?

CVE-2023-3611 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Out-of-bounds Write flaw (CWE-787) . It affects Linux kernel versions from 3.8 onward and has been patched in 6.5. CVE-2023-3611 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-3611?

CVE-2023-3611 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-2023-3611?

Yes. CVE-2023-3611 has been patched. Fixed versions include 6.5. If you are running Linux kernel 3.8 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-3611 actively exploited?

No. CVE-2023-3611 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.