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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-31418— netfilter: ipset: drop logically empty buckets in mtype_del

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mtype_del函数未正确删除逻辑空桶，可能导致内存管理问题。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 22

VendorProduct Version RangeStatus
Linux Linux 8af1c6fbd9239877998c7f5a591cb2c88d41fb66< c098ff857e7ca923539164af5b3c2fe3e8f8afaf affected
8af1c6fbd9239877998c7f5a591cb2c88d41fb66< 58f3a14826d4e6b0d5421f1a64be280b48601ea2 affected
8af1c6fbd9239877998c7f5a591cb2c88d41fb66< ad92ee87462f9a3061361d392e9dbfe2e5c1c9fb affected
8af1c6fbd9239877998c7f5a591cb2c88d41fb66< 6cea34d7ec6829b62f521a37a287f670144a2233 affected
8af1c6fbd9239877998c7f5a591cb2c88d41fb66< b7eef00f08b92b0b9efe8ae0df6d0005e6199323 affected
8af1c6fbd9239877998c7f5a591cb2c88d41fb66< 68ca0eea0af02bed36c5e2c13e9fa1647c31a7d4 affected
8af1c6fbd9239877998c7f5a591cb2c88d41fb66< ceacaa76f221a6577aba945bb8873c2e640aeba4 affected
8af1c6fbd9239877998c7f5a591cb2c88d41fb66< 9862ef9ab0a116c6dca98842aab7de13a252ae02 affected
… +14 more rows
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-31418

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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: ipset: drop logically empty buckets in mtype_del
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: drop logically empty buckets in mtype_del mtype_del() counts empty slots below n->pos in k, but it only drops the bucket when both n->pos and k are zero. This misses buckets whose live entries have all been removed while n->pos still points past deleted slots. Treat a bucket as empty when all positions below n->pos are unused and release it directly instead of shrinking it further.
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mtype_del函数未正确删除逻辑空桶，可能导致内存管理问题。
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 8af1c6fbd9239877998c7f5a591cb2c88d41fb66 ~ c098ff857e7ca923539164af5b3c2fe3e8f8afaf -
Linux Linux 5.6 -

II. Public POCs for CVE-2026-31418

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-31418

请登录查看更多情报信息。

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-2026-31416 netfilter: nfnetlink_log: account for netlink header size
CVE-2026-31415 ipv6: avoid overflows in ip6_datagram_send_ctl()

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-31418

No comments yet

Leave a comment