CVE-2024-1086: Linux Kernel Use-After-Free Vulnerability
Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.
Generated by VEDAS. Scores as of 2026-11-01 19:19 UTC. Rebuilt every few hours from cve-scores, CISA KEV and vedas-signatures. How this works and its limits.
What it is
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.
Description quoted from the CVE record (assigned by Google, published 2024-01-31).
Weakness: CWE-416 Use After Free
How it can be exploited
Exploitable with local access with low attack complexity needing low privileges and no user interaction. Impact: confidentiality high, integrity high, availability high. CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA assessment (SSVC): CISA assesses exploitation as active. Automatable: no. Technical impact: total.
- On CISA KEV since
- 2024-05-30
- US federal deadline
- 2024-06-20
- Ransomware use
- Yes
Public exploit evidence (Exploit Observer)
Exploit Observer found 20 code repositories and 14 research write-ups naming this CVE.
Code repositories that name a CVE are often scanners, copies or fakes, and some are malware. Read the code before running anything.
See all 185 references on Exploit Observer
Live scores
- EPSS
- 0.281
likely to be attacked soon - VEDAS
- 0.972
strong exploit evidence - On CISA KEV
- Yes, since 2024-05-30
- Detection rule
- Out of scope (local)
Thin horizontal line: the “likely exploited” threshold (EPSS 0.10, VEDAS 0.5). Shaded “no data” areas are periods when cve-scores did not publish.
Who is affected
| Product | Affected | Not affected |
|---|---|---|
| Linux Kernel (kernel) | from 3.15 before 6.8 | Not stated |
Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.
How to fix it
Fixed versions stated in the CVE record: 6.8.
CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Vendor guidance:
How to detect it
This bug needs local access to exploit. VEDAS signatures cover remotely exploitable bugs for now, so there is no network rule or remote check for it. Patch it and watch your endpoint telemetry for unusual local activity.
Advisories on this CVE
- Windows / Linux kernel 2025 KEV highlights (5 Feb 2025)
References
Vendor advisories and patches
Government sources
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-1086 (government-resource)
Other references
- https://kernel.dance/f342de4e2f33e0e39165d8639387aa6c19dff660
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7LSPIOMIJYTLZB6QKPQVVAYSUETUWKPF/
- https://github.com/Notselwyn/CVE-2024-1086
- https://news.ycombinator.com/item?id=39828424
- https://pwning.tech/nftables/
- http://www.openwall.com/lists/oss-security/2024/04/15/2
- http://www.openwall.com/lists/oss-security/2024/04/10/23
- http://www.openwall.com/lists/oss-security/2024/04/10/22
- http://www.openwall.com/lists/oss-security/2024/04/14/1
- http://www.openwall.com/lists/oss-security/2024/04/17/5
- https://security.netapp.com/advisory/ntap-20240614-0009/
- https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html
Other databases
Where this comes from
This advisory is generated automatically by VEDAS from: CVE.org record, CISA KEV, cve-scores (EPSS and VEDAS), Exploit Observer. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.
Supporting partners
