VULNERABILITY INTELLIGENCE

CVE-2023-2236

CVSS score7.8 HIGH
EPSS probability0.43%
CISA KEVNot currently listed
Published2023-05-01
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation. Both io_install_fixed_file and its callers call fput in a file in case of an error, causing a reference underflow which leads to a use-after-free vulnerability. We recommend upgrading past commit 9d94c04c0db024922e886c9fd429659f22f48ea4.

Weakness classification

  • cve-coordination@google.com: CWE-416
  • nvd@nist.gov: CWE-416

Primary references