CVE-2026-31428
kernel: netfilter: nfnetlink_log: fix uninitialized padding leak in NFULA_PAYLOAD
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · April 13, 2026
Updated · June 28, 2026
Description
A flaw was found in the Linux kernel's netfilter component. When manually constructing the NFULA_PAYLOAD netlink attribute, uninitialized padding bytes are not properly cleared. This oversight allows a local user to access stale heap memory contents through the NFLOG netlink socket, leading to information disclosure.
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 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-824 · Access of Uninitialized Pointer