Linux Kernel up to 6.7 Netfilter nf_tables_api.c nft_verdict_init use after free

CVSS Meta Temp Score
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CTI Interest Score
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7.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.7. It has been declared as critical. The impacted element is the function nft_verdict_init of the file net/netfilter/nf_tables_api.c of the component Netfilter. The manipulation results in use after free. This vulnerability was named CVE-2024-1086. The attack needs to be approached locally. In addition, an exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.7 (Operating System). Affected is the function nft_verdict_init of the file net/netfilter/nf_tables_api.c of the component Netfilter. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. The nft_verdict_init() function allows positive values as drop error within the hook verdict, and hence the nf_hook_slow() function can cause a double free vulnerability when NF_DROP is issued with a drop error which resembles NF_ACCEPT. We recommend upgrading past commit f342de4e2f33e0e39165d8639387aa6c19dff660.

The weakness was presented 01/31/2024 by Notselwyn. The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2024-1086 since 01/30/2024. Technical details and a exploit are known. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/30/2025).

It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 240010 (TencentOS Server 2: kernel (TSSA-2024:1031)), which helps to determine the existence of the flaw in a target environment. This issue was added on 05/30/2024 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 06/20/2024:

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Upgrading to version 6.8 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (240010). Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.7

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CNA Base Score: 7.8
CNA Vector (Google Inc.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Attacked

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 240010
Nessus Name: TencentOS Server 2: kernel (TSSA-2024:1031)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.8
Patch: git.kernel.org

Timelineinfo

01/30/2024 🔍
01/31/2024 +1 days 🔍
01/31/2024 +0 days 🔍
10/30/2025 +638 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: FEDORA-2024-2116a8468b
Researcher: Notselwyn
Status: Confirmed

CVE: CVE-2024-1086 (🔍)
GCVE (CVE): GCVE-0-2024-1086
GCVE (VulDB): GCVE-100-252468
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 01/31/2024 13:35
Updated: 10/30/2025 20:51
Changes: 01/31/2024 13:35 (53), 02/22/2024 14:17 (1), 02/22/2024 14:20 (1), 05/30/2024 21:50 (26), 06/07/2024 18:44 (12), 09/09/2024 22:30 (2), 06/17/2025 15:45 (2), 10/30/2025 20:51 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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