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

Goal: 1000 CNY · Raised: 1310 CNY

100%
Buy Us a Coffee

CVE-2026-45859— netfilter: nfnetlink_queue: do shared-unconfirmed check before segmentation

CVSS 7.5 · High EPSS 0.04% · P13

Possible ATT&CK Techniques 1AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinux7d8dc1c7be8d3509e8f5164dd5df64c8e34d7eeb< 79b713ef4261a8ead96af4703f89d0b5f25532e2affected
7d8dc1c7be8d3509e8f5164dd5df64c8e34d7eeb< 23901aa6b8a2f294c4b774436b4691f3ff863a8faffected
7d8dc1c7be8d3509e8f5164dd5df64c8e34d7eeb< b740e7ddd7ca0dbfeafca3f5e52717206cf28524affected
7d8dc1c7be8d3509e8f5164dd5df64c8e34d7eeb< 207b3ebacb6113acaaec0d171d5307032c690004affected
6c4a0ba674f410ab99a30a16f32dac0ebfed5cd3affected
6dcc8ba8a6074bb79040f502dc66ad23a58a1c86affected
74e6eb7fd27ef1ccc68041dbc66e6d80d2e4a1a0affected
025b3326c5c409b372d0103ad30f174e55adbd1baffected
… +10 more rows
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-45859

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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: nfnetlink_queue: do shared-unconfirmed check before segmentation
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_queue: do shared-unconfirmed check before segmentation Ulrich reports a regression with nfqueue: If an application did not set the 'F_GSO' capability flag and a gso packet with an unconfirmed nf_conn entry is received all packets are now dropped instead of queued, because the check happens after skb_gso_segment(). In that case, we did have exclusive ownership of the skb and its associated conntrack entry. The elevated use count is due to skb_clone happening via skb_gso_segment(). Move the check so that its peformed vs. the aggregated packet. Then, annotate the individual segments except the first one so we can do a 2nd check at reinject time. For the normal case, where userspace does in-order reinjects, this avoids packet drops: first reinjected segment continues traversal and confirms entry, remaining segments observe the confirmed entry. While at it, simplify nf_ct_drop_unconfirmed(): We only care about unconfirmed entries with a refcnt > 1, there is no need to special-case dying entries. This only happens with UDP. With TCP, the only unconfirmed packet will be the TCP SYN, those aren't aggregated by GRO. Next patch adds a udpgro test case to cover this scenario.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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netfilter nfnetlink_queue模块在分段前未正确检查共享未确认连接，可能导致数据包丢失。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 7d8dc1c7be8d3509e8f5164dd5df64c8e34d7eeb ~ 79b713ef4261a8ead96af4703f89d0b5f25532e2 -
LinuxLinux 6.11 -

II. Public POCs for CVE-2026-45859

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-45859

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-45859 (4)

Same Patch Batch · Linux · 2026-05-27 · 276 CVEs total

CVE-2026-460399.8 CRITICALrxgk: Fix potential integer overflow in length check
CVE-2026-458989.8 CRITICALRDMA/iwcm: Fix workqueue list corruption by removing work_list
CVE-2026-459889.8 CRITICALrxrpc: Fix re-decryption of RESPONSE packets
CVE-2026-459729.8 CRITICALsmb: client: fix potential UAF and double free in smb2_open_file()
CVE-2026-460439.1 CRITICALRDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
CVE-2026-460568.8 HIGHBluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2026-459458.8 HIGHiommu/vt-d: Fix race condition during PASID entry replacement
CVE-2026-460378.2 HIGHipv4: icmp: validate reply type before using icmp_pointers
CVE-2026-458438.2 HIGHslip: bound decode() reads against the compressed packet length
CVE-2026-460108.1 HIGHrxrpc: Fix error handling in rxgk_extract_token()
CVE-2026-460998.1 HIGHnet: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
CVE-2026-460767.9 HIGHKVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1
CVE-2026-458787.8 HIGHdrm/amdkfd: Fix watch_id bounds checking in debug address watch v2
CVE-2026-459597.8 HIGHcrypto: ccp - Fix a crash due to incorrect cleanup usage of kfree
CVE-2026-460117.8 HIGHmedia: mtk-jpeg: fix use-after-free in release path due to uncancelled work
CVE-2026-458947.8 HIGHiommu/vt-d: Clear Present bit before tearing down PASID entry
CVE-2026-460157.8 HIGHtcp: call sk_data_ready() after listener migration
CVE-2026-458527.8 HIGHRDMA/rxe: Fix double free in rxe_srq_from_init
CVE-2026-460537.8 HIGHnet: rds: fix MR cleanup on copy error
CVE-2026-458627.8 HIGHiommu/vt-d: Flush cache for PASID table before using it

Showing top 20 of 276 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-45859

No comments yet

Leave a comment