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7.8
HIGH CVSS 3.1
CVE-2023-3609
Linux Kernel cls_u32 Use-After-Free Vulnerability
Description

A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation. If tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability. We recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc.

INFO

Published Date :

July 21, 2023, 9:15 p.m.

Last Modified :

Feb. 13, 2025, 5:16 p.m.

Remotely Exploit :

No

Source :

[email protected]
Affected Products

The following products are affected by CVE-2023-3609 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
1 Debian debian_linux
: Total Affected Vendor : 2 | Products : 2
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH [email protected]
CVSS 3.1 HIGH [email protected]
Solution
This vulnerability is addressed by updating the Linux kernel and other packages.
  • Update the affected kernel packages.
  • Update the affected packages based on vendor guidance.
Public PoC/Exploit Available at Github

CVE-2023-3609 has a 2 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-3609.

URL Resource
http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=04c55383fa5689357bcdd2c8036725a55ed632bc Mailing List Patch Vendor Advisory
https://kernel.dance/04c55383fa5689357bcdd2c8036725a55ed632bc Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
https://security.netapp.com/advisory/ntap-20230818-0005/ Third Party Advisory
https://www.debian.org/security/2023/dsa-5480 Third Party Advisory
http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=04c55383fa5689357bcdd2c8036725a55ed632bc Mailing List Patch Vendor Advisory
https://kernel.dance/04c55383fa5689357bcdd2c8036725a55ed632bc Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
https://security.netapp.com/advisory/ntap-20230818-0005/ Third Party Advisory
https://www.debian.org/security/2023/dsa-5480 Third Party Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-3609 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-3609 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
Jturnxd/CVE-2023-3609

None

Makefile Assembly C Shell Python

Updated: 1 day, 23 hours ago
0 stars 0 fork 0 watcher
Born at : Aug. 27, 2025, 1:24 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
PuddinCat/GithubRepoSpider

监控Github最新网络安全相关的仓库...

cve cybersecurity github spider

Shell Python Nix

Updated: 13 hours, 46 minutes ago
22 stars 3 fork 3 watcher
Born at : May 9, 2025, 2:29 p.m. This repo has been linked 24 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-3609 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2023-3609 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    Feb. 13, 2025

    Action Type Old Value New Value
    Changed Description A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation. If tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability. We recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc. A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation. If tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability. We recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc.
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html
    Added Reference http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
    Added Reference https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=04c55383fa5689357bcdd2c8036725a55ed632bc
    Added Reference https://kernel.dance/04c55383fa5689357bcdd2c8036725a55ed632bc
    Added Reference https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
    Added Reference https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
    Added Reference https://security.netapp.com/advisory/ntap-20230818-0005/
    Added Reference https://www.debian.org/security/2023/dsa-5480
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Jan. 11, 2024

    Action Type Old Value New Value
    Added Reference Google Inc. https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html [No types assigned]
  • CVE Modified by [email protected]

    Nov. 29, 2023

    Action Type Old Value New Value
    Added Reference Google Inc. http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html [No types assigned]
  • Modified Analysis by [email protected]

    Oct. 26, 2023

    Action Type Old Value New Value
    Changed Reference Type http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html No Types Assigned http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html Third Party Advisory, VDB Entry
    Changed Reference Type https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html No Types Assigned https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html Mailing List, Third Party Advisory
    Changed Reference Type https://security.netapp.com/advisory/ntap-20230818-0005/ No Types Assigned https://security.netapp.com/advisory/ntap-20230818-0005/ Third Party Advisory
    Changed Reference Type https://www.debian.org/security/2023/dsa-5480 No Types Assigned https://www.debian.org/security/2023/dsa-5480 Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Oct. 20, 2023

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html [No Types Assigned]
  • CVE Modified by [email protected]

    Oct. 11, 2023

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html [No Types Assigned]
  • CVE Modified by [email protected]

    Aug. 19, 2023

    Action Type Old Value New Value
    Added Reference https://www.debian.org/security/2023/dsa-5480 [No Types Assigned]
  • CVE Modified by [email protected]

    Aug. 18, 2023

    Action Type Old Value New Value
    Added Reference https://security.netapp.com/advisory/ntap-20230818-0005/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Jul. 31, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=04c55383fa5689357bcdd2c8036725a55ed632bc No Types Assigned https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=04c55383fa5689357bcdd2c8036725a55ed632bc Mailing List, Patch, Vendor Advisory
    Changed Reference Type https://kernel.dance/04c55383fa5689357bcdd2c8036725a55ed632bc No Types Assigned https://kernel.dance/04c55383fa5689357bcdd2c8036725a55ed632bc Vendor Advisory
    Added CWE NIST CWE-416
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.14 up to (excluding) 6.4 *cpe:2.3:o:linux:linux_kernel:6.4:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.4:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.4:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.4:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.4:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.4:rc6:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.02 }} 0.00%

score

0.01752

percentile