CVE-2026-98793
kernel: netfilter: bpf: reject invalid NAT manipulation types
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 18, 2026
Updated · October 24, 2026
Description
A flaw was found in the Linux kernel's netfilter subsystem. Missing validation of Network Address Translation (NAT) manipulation types in BPF connection tracking helpers allows a local user with permissions to run BPF programs to trigger a system crash. By supplying an invalid manipulation type, an attacker can cause the kernel to access uninitialized data structures or trigger a kernel panic, resulting in a Denial of Service (DoS).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 4.4CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CWE-824 · Access of Uninitialized Pointer