In the Linux kernel, the following vulnerability has been resolved:
netfilter: nfnetlink_log: fix uninitialized padding leak in NFULA_PAYLOAD
__build_packet_message() manually constructs the NFULA_PAYLOAD netlink
attribute using skb_put() and skb_copy_bits(), bypassing the standard
nla_reserve()/nla_put() helpers. While nla_total_size(data_len) bytes
are allocated (including NLA alignment padding), only data_len bytes
of actual packet data are copied. The trailing nla_padlen(data_len)
bytes (1-3 when data_len is not 4-byte aligned) are never initialized,
leaking stale heap contents to userspace via the NFLOG netlink socket.
Replace the manual attribute construction with nla_reserve(), which
handles the tailroom check, header setup, and padding zeroing via
__nla_reserve(). The subsequent skb_copy_bits() fills in the payload
data on top of the properly initialized attribute.
References
Configurations
Configuration 1 (hide)
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History
20 May 2026, 19:24
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* |
|
| First Time |
Linux linux Kernel
Linux |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| References | () https://git.kernel.org/stable/c/21d8efda029948d3666b0db5afcc0d36c0984aae - Patch | |
| References | () https://git.kernel.org/stable/c/52025ebaa29f4eb4ed8bf92ce83a68f24ab7fdf7 - Patch | |
| References | () https://git.kernel.org/stable/c/7eff72968161fb8ddb26113344de3b92fb7d7ef5 - Patch | |
| References | () https://git.kernel.org/stable/c/7f3e5d72455936f42709116fabeca3bb216cda62 - Patch | |
| References | () https://git.kernel.org/stable/c/a2f6ff3444b663d6cfa63eadd61327a18592885a - Patch | |
| References | () https://git.kernel.org/stable/c/a8365d1064ded323797c5e28e91070c52f44b76c - Patch | |
| References | () https://git.kernel.org/stable/c/c9f6c51d36482805ac3ffadb9663fe775a13e926 - Patch | |
| References | () https://git.kernel.org/stable/c/fc961dd7272b5e4a462999635e44a4770d7f2482 - Patch | |
| CWE | CWE-908 |
18 Apr 2026, 09:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
13 Apr 2026, 14:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-13 14:16
Updated : 2026-05-20 19:24
NVD link : CVE-2026-31428
Mitre link : CVE-2026-31428
CVE.ORG link : CVE-2026-31428
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-908
Use of Uninitialized Resource