CVE-2023-4015

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

HIGH
7.8
CVSS Score
Published: September 6, 2023 at 01:52 PM UTC
Updated: October 14, 2026 at 10:17 PM UTC
2 products affected across 2 vendorsLinux KernelDebian Linux

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Severity
HIGH7.8
Exploit prediction
EPSS 0.3%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

5.11 ≤ v < 5.15.1245.16 ≤ v < 6.1.435.9 ≤ v < 5.10.1906.2 ≤ v < 6.4.86.4
Affected range stops below 5.10.190, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.15.124, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.1.43, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.4.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.5, so it looks safe — our inference, not a vendor statement

CVSS

7.8HIGHGoogle
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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