CVE-2023-39189
A flaw was found in the Netfilter subsystem in the Linux kernel.
Published Oct 9, 2023 · updated Oct 15, 2026 · linux linux kernel
A flaw was found in the Netfilter subsystem in the Linux kernel. The nfnl_osf_add_callback function did not validate the user mode controlled opt_num field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, leading to a crash or information disclosure.
Timeline
Detection, updates, and resolution for this record.
Oct 9, 2023 · NIST NVD
Detected
A flaw was found in the Netfilter subsystem in the Linux kernel. The nfnl_osf_add_callback function did not validate the user mode controlled opt_num field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, leading to a crash or information disclosure.
Oct 15, 2026 · NIST NVD
Updated
A flaw was found in the Netfilter subsystem in the Linux kernel. The nfnl_osf_add_callback function did not validate the user mode controlled opt_num field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, leading to a crash or information disclosure.
Affected
- cpe fedoraproject/fedora38
- cpe linux/linux kernelversion unspecified
- cpe redhat/enterprise linux8.0
- cpe redhat/enterprise linux9.0
Sources
- CVE.orgCVE-2023-39189
Official CVE identifier
cve.org - FIRST EPSSCVE-2023-39189
30-day exploitation probability 0.4%
first.org - NIST NVDCVE-2023-39189
A flaw was found in the Netfilter subsystem in the Linux kernel. The nfnl_osf_add_callback function did not validate the user mode controlled opt_num field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, leading to a crash or inform
nvd.nist.gov