Linux · Kernel
CVE-2024-1086
Use-after-free in Linux kernel's netfilter: nf_tables component
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.
CISA: Linux kernel contains a use-after-free vulnerability in the netfilter: nf_tables component that allows an attacker to achieve local privilege escalation.
What to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Deadline for US federal agencies: June 20, 2024
- Added to the CISA list
- May 30, 2024
- Published
- January 31, 2024
- Severity
- High 7.8 CVSS 3.1
- Chance of attacks in the next 30 days (EPSS)
- 28% in the top 1.9% of all known vulnerabilities
- Weakness
- CWE-416
- More details
- NVD · CVE.org · CISA
All references (14)
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f342de4e2f33e0e39165d8639387aa6…
- https://kernel.dance/f342de4e2f33e0e39165d8639387aa6c19dff660
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7LSPIOMIJYTLZB…
- 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
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
More exploited flaws from Linux
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Sep 18, 2026 | Improper Check for Unusual or Exceptional Conditions | Kernel | Critical 9.8 | 3.3% |
| Sep 18, 2026 | Race Condition | Kernel | High 7.8 | 1.6% |
| Sep 18, 2026 | Out-of-Bounds Write | Kernel | High 8.8 | 0.9% |
| Aug 27, 2026 | Unspecified | Kernel | High 7.8 | 0.7% |
| Aug 26, 2026 | Out-of-Bounds Write | Kernel | High 7.8 | 8.9% |
| Jun 2, 2026 | Improper Authentication | Kernel | High 7.8 | 5.5% |
| May 1, 2026 | Incorrect Resource Transfer Between Spheres | Kernel | High 7.8 | 98% |
| Jan 26, 2026 | Integer Overflow | Kernel | High 7.8 | 15% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.