Use After Free in Linux Kernel
CVE-2023-4015
A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. On an error when building a nftables rule, deactivating immediate expressions in nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but later used. We recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2.
Vulnerability class: Use-After-Free
EPSS: 0.003 (20.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Linux Kernel — versions 6.4
- Linux Linux_kernel
- Debian Debian_linux — versions 12.0
Weakness classification (CWE)
References
- cve-coordination@google.com (Patch, Mailing List, patch, Issue Tracking, Vendor Advisory)
- cve-coordination@google.com (Patch, Vendor Advisory)
- cve-coordination@google.com (Third Party Advisory)
Frequently asked questions
- What is CVE-2023-4015?
- CVE-2023-4015 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2023-09-06.
- How severe is CVE-2023-4015?
- High severity. CVSS v3 base score is 7.8 out of 10.