CVE-2023-31248
Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability
- Published
- Jul 5, 2023
- Updated
- Mar 5, 2025
- Assigning CNA
- canonical
- Evidence observed
- Aug 28, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 80.1%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability; `nft_chain_lookup_byid()` failed to check whether a chain was active and CAP_NET_ADMIN is in any user or network namespace
Sources
1- CVEPoC
A collection of proof-of-concept exploit scripts written by the STAR Labs team for various CVEs that they discovered or found by others.
Responsible use
Use vulnerability information only on systems you own or are authorized to test. Kitploit links to public research metadata and does not store exploit code or malicious payloads.