CVE-2023-31248

HIGH EXPLOITED

Linux Kernel >=5.9 <5.10.188 - Use-After-Free in nft_chain_lookup_byid

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2023-31248 has been observed exploited in the wild (reported by VulnCheck KEV).

Description

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

References (10)

Core 10
Core References
Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/07/05/2

Scores

CVSS v3 7.8
EPSS 0.0022
EPSS Percentile 44.2%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

VulnCheck KEV 2024-12-06
CWE
CWE-416
Status published
Products (9)
canonical/ubuntu_linux 14.04
canonical/ubuntu_linux 16.04
canonical/ubuntu_linux 18.04
canonical/ubuntu_linux 20.04
canonical/ubuntu_linux 22.04
debian/debian_linux 11.0
fedoraproject/fedora 37
fedoraproject/fedora 38
linux/linux_kernel 5.9 - 5.10.188
Published Jul 05, 2023
Tracked Since Feb 18, 2026