CVE-2023-4015

Name: CVE-2023-4015
Creator: NVD / NIST
Published: 2023-09-06T14:15:11.093+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.29%

Last modified Jun 17, 2026

CVE-2023-4015 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. On an error when building a nftables rule, deactivating immediate expressions in nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but later used. We recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2.. EPSS estimates a 0.29% chance of exploitation in the next 30 days.

Description

A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. On an error when building a nftables rule, deactivating immediate expressions in nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but later used. We recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.29%

20.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 5.9, < 5.10.190
Linux	Linux Kernel	>= 5.11, < 5.15.124
Linux	Linux Kernel	>= 5.16, < 6.1.43
Linux	Linux Kernel	>= 6.2, < 6.4.8
Debian	Debian Linux	12.0

References

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0a771f7b266b02d262900c75f1e175c7fe76fec2Issue Tracking, Mailing List, Patch, Vendor Advisory
https://kernel.dance/0a771f7b266b02d262900c75f1e175c7fe76fec2Patch, Vendor Advisory
https://www.debian.org/security/2023/dsa-5492Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0a771f7b266b02d262900c75f1e175c7fe76fec2Issue Tracking, Mailing List, Patch, Vendor Advisory
https://kernel.dance/0a771f7b266b02d262900c75f1e175c7fe76fec2Patch, Vendor Advisory
https://www.debian.org/security/2023/dsa-5492Third Party Advisory

Timeline

Published: Sep 6, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-4015?

How severe is CVE-2023-4015?

CVE-2023-4015 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.

How do I fix CVE-2023-4015?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-4015?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST