CVE-2023-4015

HighCVSS 7.8/10Last modified Oct 14, 2026

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 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

Vendor	Product	Versions
Linux	Kernel	>= 6.4, < 6.5
Siemens	SIMATIC S7-1500 TM MFP - GNU/Linux subsystem	< V1.1

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
https://cert-portal.siemens.com/productcert/html/ssa-794697.html
https://cert-portal.siemens.com/productcert/html/ssa-831302.html

Timeline

Published: Sep 6, 2023
Last modified: Oct 14, 2026
NVD status: Modified

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