CVE-2023-4015

Use-after-free in Linux kernel's netfilter: nf_tables component

At a glance

Severity: HIGH 7.8
EPSS: EPSS 0.29 % · percentile 22 (2026-10-27)
State: PUBLISHED
Published: 2023-09-06
Updated: 2026-10-14
Assigner: Google
NVD status: Modified

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Google
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	NVD · cve-coordination@google.com (Secondary)
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	NVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

CWE-416

European references

ENISA EUVD · EUVD-2023-53908
GCVE · GCVE-0-2023-4015

CERT-FR advisories

CERTFR-2023-AVI-0775 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
CERTFR-2023-AVI-0752 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
CERTFR-2023-AVI-0726 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
CERTFR-2023-AVI-0704 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* ≥ 5.9 < 5.10.190
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* ≥ 5.11 < 5.15.124
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* ≥ 5.16 < 6.1.43
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* ≥ 6.2 < 6.4.8
cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*

Affected products

Product	Versions
Linux · Kernel	affected 6.4 < 6.5

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD