CVE-2024-1086: CWE-416 Use After Free in Linux Kernel
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.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition in the Linux kernel's netfilter nf_tables subsystem. Specifically, the nft_verdict_init() function permits positive values as drop errors within hook verdicts, leading to a double free in nf_hook_slow() when NF_DROP is issued with a drop error that mimics NF_ACCEPT. Exploiting this flaw can result in local privilege escalation by corrupting kernel memory management.
Potential Impact
Successful exploitation allows a local attacker to escalate privileges on the affected Linux system, potentially gaining higher-level access or control. The CVSS score of 7.8 indicates high severity with impacts on confidentiality, integrity, and availability.
Mitigation Recommendations
A fix is available by upgrading the Linux kernel beyond the commit f342de4e2f33e0e39165d8639387aa6c19dff660. Users and administrators should apply this update to mitigate the vulnerability. Patch status is confirmed by the vendor recommendation to upgrade past the specified commit.
CVE-2024-1086: CWE-416 Use After Free in Linux Kernel
Description
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.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free condition in the Linux kernel's netfilter nf_tables subsystem. Specifically, the nft_verdict_init() function permits positive values as drop errors within hook verdicts, leading to a double free in nf_hook_slow() when NF_DROP is issued with a drop error that mimics NF_ACCEPT. Exploiting this flaw can result in local privilege escalation by corrupting kernel memory management.
Potential Impact
Successful exploitation allows a local attacker to escalate privileges on the affected Linux system, potentially gaining higher-level access or control. The CVSS score of 7.8 indicates high severity with impacts on confidentiality, integrity, and availability.
Mitigation Recommendations
A fix is available by upgrading the Linux kernel beyond the commit f342de4e2f33e0e39165d8639387aa6c19dff660. Users and administrators should apply this update to mitigate the vulnerability. Patch status is confirmed by the vendor recommendation to upgrade past the specified commit.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- Date Reserved
- 2024-01-30T20:04:09.704Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 68f7d9b0247d717aace268c8
Added to database: 10/21/2025, 19:06:24 UTC
Last enriched: 08/08/2026, 13:01:06 UTC
Last updated: 09/10/2026, 19:36:47 UTC
Views: 141
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