Use After Free in Linux Kernel
CVE-2023-1872
A use-after-free vulnerability in the Linux Kernel io_uring system can be exploited to achieve local privilege escalation. The io_file_get_fixed function lacks the presence of ctx->uring_lock which can lead to a Use-After-Free vulnerability due a race condition with fixed files getting unregistered. We recommend upgrading past commit da24142b1ef9fd5d36b76e36bab328a5b27523e8.
Vulnerability class: Use-After-Free
EPSS: 0.003 (20.7th 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 5.7
- Linux Linux_kernel
- Debian Debian_linux — versions 10.0
Weakness classification (CWE)
References
- cve-coordination@google.com (Product, Mailing List)
- cve-coordination@google.com (Patch, Mailing List)
- cve-coordination@google.com (Third Party Advisory)
- cve-coordination@google.com (Third Party Advisory)
- cve-coordination@google.com (VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-1872?
- CVE-2023-1872 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2023-04-12.
- How severe is CVE-2023-1872?
- High severity. CVSS v3 base score is 7.8 out of 10.