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CVE-2026-31416— netfilter: nfnetlink_log: account for netlink header size

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未考虑netlink标头大小，可能导致netlink消息被丢弃。

AI Predicted 5.3 Difficulty: Trivial EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1036 · Masquerading

Affected Version Matrix 26

VendorProduct Version RangeStatus
Linux Linux 9dfa1dfe4d5e5e66a991321ab08afe69759d797a< 4ec216410fac9de83c99177a160ebb8d42fad075 affected
9dfa1dfe4d5e5e66a991321ab08afe69759d797a< 09883bf257f4243ed5a1fd35078ec6f0d0f3696a affected
9dfa1dfe4d5e5e66a991321ab08afe69759d797a< 761b45c661af48da6a065868d59ab1e1f64fd9b6 affected
9dfa1dfe4d5e5e66a991321ab08afe69759d797a< 607245c4dbb86d9a10dd8388da0fb82170a99b61 affected
9dfa1dfe4d5e5e66a991321ab08afe69759d797a< 6b419700e459fbf707ca1543b7c1b57a60fedb73 affected
9dfa1dfe4d5e5e66a991321ab08afe69759d797a< 88a8f56e6276f616baad4274c6b8e4683e26e520 affected
9dfa1dfe4d5e5e66a991321ab08afe69759d797a< f08ffa3e1c8e36b6131f69c5eb23700c28cbd262 affected
9dfa1dfe4d5e5e66a991321ab08afe69759d797a< 6d52a4a0520a6696bdde51caa11f2d6821cd0c01 affected
… +18 more rows
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I. Basic Information for CVE-2026-31416

Vulnerability Information
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Vulnerability Title
netfilter: nfnetlink_log: account for netlink header size
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_log: account for netlink header size This is a followup to an old bug fix: NLMSG_DONE needs to account for the netlink header size, not just the attribute size. This can result in a WARN splat + drop of the netlink message, but other than this there are no ill effects.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未考虑netlink标头大小，可能导致netlink消息被丢弃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 9dfa1dfe4d5e5e66a991321ab08afe69759d797a ~ 4ec216410fac9de83c99177a160ebb8d42fad075 -
Linux Linux 3.18 -

II. Public POCs for CVE-2026-31416

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III. Intelligence Information for CVE-2026-31416

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Same Patch Batch · Linux · 2026-04-13 · 15 CVEs total

CVE-2026-31414 9.8 CRITICAL netfilter: nf_conntrack_expect: use expect->helper
CVE-2026-31419 7.8 HIGH net: bonding: fix use-after-free in bond_xmit_broadcast()
CVE-2026-31417 7.5 HIGH net/x25: Fix overflow when accumulating packets
CVE-2026-31426 7.0 HIGH ACPI: EC: clean up handlers on probe failure in acpi_ec_setup()
CVE-2026-31428 netfilter: nfnetlink_log: fix uninitialized padding leak in NFULA_PAYLOAD
CVE-2026-31427 netfilter: nf_conntrack_sip: fix use of uninitialized rtp_addr in process_sdp
CVE-2026-31425 rds: ib: reject FRMR registration before IB connection is established
CVE-2026-31424 netfilter: x_tables: restrict xt_check_match/xt_check_target extensions for NFPROTO_ARP
CVE-2026-31423 net/sched: sch_hfsc: fix divide-by-zero in rtsc_min()
CVE-2026-31422 net/sched: cls_flow: fix NULL pointer dereference on shared blocks
CVE-2026-31420 bridge: mrp: reject zero test interval to avoid OOM panic
CVE-2026-31421 net/sched: cls_fw: fix NULL pointer dereference on shared blocks
CVE-2026-31418 netfilter: ipset: drop logically empty buckets in mtype_del
CVE-2026-31415 ipv6: avoid overflows in ip6_datagram_send_ctl()

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-31416

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