Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1000 CNY

100.0%
Buy Us a Coffee

CVE-2026-31414— netfilter: nf_conntrack_expect: use expect->helper

CVSS 9.8 · Critical EPSS 0.07% · P22
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-31414

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
netfilter: nf_conntrack_expect: use expect->helper
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_expect: use expect->helper Use expect->helper in ctnetlink and /proc to dump the helper name. Using nfct_help() without holding a reference to the master conntrack is unsafe. Use exp->master->helper in ctnetlink path if userspace does not provide an explicit helper when creating an expectation to retain the existing behaviour. The ctnetlink expectation path holds the reference on the master conntrack and nf_conntrack_expect lock and the nfnetlink glue path refers to the master ct that is attached to the skb.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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，该漏洞源于未使用expect->helper，可能导致转储帮助程序名称时出现不安全行为。
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)

Shenlong Deep Dive — AI Deep Analysis

10-question deep dive: root cause, exploitation, mitigation, urgency. Read summary free, full version requires login.

Read summary Full analysis (login)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux ea781f197d6a835cbb93a0bf88ee1696296ed8aa ~ 847cb7fe26c5ce5dce0d1a41fac1ea488b7f1781 -
LinuxLinux 2.6.30 -

II. Public POCs for CVE-2026-31414

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-31414

请登录查看更多情报信息。

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

CVE-2026-314197.8 HIGHnet: bonding: fix use-after-free in bond_xmit_broadcast()
CVE-2026-314177.5 HIGHnet/x25: Fix overflow when accumulating packets
CVE-2026-314267.0 HIGHACPI: EC: clean up handlers on probe failure in acpi_ec_setup()
CVE-2026-31428netfilter: nfnetlink_log: fix uninitialized padding leak in NFULA_PAYLOAD
CVE-2026-31427netfilter: nf_conntrack_sip: fix use of uninitialized rtp_addr in process_sdp
CVE-2026-31425rds: ib: reject FRMR registration before IB connection is established
CVE-2026-31424netfilter: x_tables: restrict xt_check_match/xt_check_target extensions for NFPROTO_ARP
CVE-2026-31423net/sched: sch_hfsc: fix divide-by-zero in rtsc_min()
CVE-2026-31422net/sched: cls_flow: fix NULL pointer dereference on shared blocks
CVE-2026-31420bridge: mrp: reject zero test interval to avoid OOM panic
CVE-2026-31421net/sched: cls_fw: fix NULL pointer dereference on shared blocks
CVE-2026-31418netfilter: ipset: drop logically empty buckets in mtype_del
CVE-2026-31416netfilter: nfnetlink_log: account for netlink header size
CVE-2026-31415ipv6: avoid overflows in ip6_datagram_send_ctl()

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-31414

No comments yet

Leave a comment