CVE-2024-1086 | Use-after-free in Linux kernel's netfilter: nf_tables component

Exp

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.

Published: 2024-01-31 Last update: 2025-10-27 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-1086 is rated Critical Active Threat (91.5/100): CVSS High severity, with high exploitation likelihood (EPSS 85.26%, 99th percentile). CISA KEV confirms active exploitation (added 2024-05-30) affecting Linux / Kernel. a weakness (CWE-416) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2024-1086

Name: Linux Kernel Use-After-Free Vulnerability · CISA KEV detail

Exploit added: 2024-05-30

Action due: 2024-06-20

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

Public exploit references (Exploit-DB) for CVE-2024-1086

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2024-1086

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-01 84.72% 85.26% +0.54%
2 2026-05-30 85.26% 84.72% -0.54%
3 2026-05-29 — 85.26% —

Full EPSS history (115 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-1086

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]

Weakness enumeration for CVE-2024-1086

OS Trackers for CVE-2024-1086

vendor priority summary link
debian not yet assigned CVE-2024-1086 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2024-1086
redhat high — https://access.redhat.com/security/cve/CVE-2024-1086
suse high — https://www.suse.com/security/cve/CVE-2024-1086/
ubuntu high CVE-2024-1086 high priority: Ubuntu including 166 source packages (linux, linux-allwinner-5.19, …), 1752 status rows across 11 suites (bionic, focal, jammy, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1320, released 206, ignored 136, not-affected 88, needs-triage 2. https://ubuntu.com/security/CVE-2024-1086

Affected software / configurations for CVE-2024-1086

Vendor Product Version Raw CPE
linux linux_kernel >= 3.15, < 5.15.149 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.1, < 6.1.76 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.2, < 6.6.15 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.7, < 6.7.3 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel 6.8 cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*
fedoraproject fedora 39 cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
redhat enterprise_linux_desktop 7.0 cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_for_ibm_z_systems 7.0_s390x cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:7.0_s390x:*:*:*:*:*:*:*
redhat enterprise_linux_for_power_big_endian 7.0_ppc64 cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian:7.0_ppc64:*:*:*:*:*:*:*
redhat enterprise_linux_for_power_little_endian 7.0_ppc64le cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:7.0_ppc64le:*:*:*:*:*:*:*
redhat enterprise_linux_server 7.0 cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 7.0 cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
netapp a250_firmware — cpe:2.3:o:netapp:a250_firmware:-:*:*:*:*:*:*:*
netapp 500f_firmware — cpe:2.3:o:netapp:500f_firmware:-:*:*:*:*:*:*:*
netapp c250_firmware — cpe:2.3:o:netapp:c250_firmware:-:*:*:*:*:*:*:*

References for CVE-2024-1086

URL Tags
http://www.openwall.com/lists/oss-security/2024/04/10/22 Mailing List Patch
http://www.openwall.com/lists/oss-security/2024/04/10/23 Mailing List Patch
http://www.openwall.com/lists/oss-security/2024/04/14/1 Exploit Mailing List
http://www.openwall.com/lists/oss-security/2024/04/15/2 Mailing List
http://www.openwall.com/lists/oss-security/2024/04/17/5 Exploit Mailing List
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f342de4e2f33e0e39165d8639387aa6c19dff660 Patch
https://github.com/Notselwyn/CVE-2024-1086 Exploit Third Party Advisory
https://kernel.dance/f342de4e2f33e0e39165d8639387aa6c19dff660 Patch
https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html Mailing List
https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/7LSPIOMIJYTLZB6QKPQVVAYSUETUWKPF/ Mailing List
https://news.ycombinator.com/item?id=39828424 Issue Tracking
https://pwning.tech/nftables/ Exploit Technical Description Third Party Advisory
https://security.netapp.com/advisory/ntap-20240614-0009/ Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-1086 US Government Resource
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