CVE-2026-98320 Linux — Exploit & Vulnerability Details HIGH

Parameter	Value
CVSS	7.8 (HIGH)
Affected Versions	4.16 — 7.3-rc4
Fixed In	5.10.271
Vendor	Linux
Public PoC	No

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: hold reference on ct until flow is released nf_ct_put() releases the ct->ext area inmediately, the rcu typesafe semantics also allow to refer to the wrong conntrack from the flowtable datapath. Hold reference on ct until flow is released after rcu grace period. Add rcu_barrier() on module exit path, to ensure pending flow entries are release before module goes away.

Attack Parameters

Attack Vector

Local

Requires local access

Attack Complexity

Low

Easy to exploit

Privileges Required

Low

Basic privileges needed

User Interaction

None

No user interaction needed

Impact Assessment

Confidentiality

High

Complete data leak

Integrity

High

Complete data modification

Availability

High

Complete denial of service

CVSS Vector v3.1

Vulnerable Products 8

Configuration	From (including)	Up to (excluding)
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`4.16`	`5.10.271`
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`4.16`	`5.15.222`
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`4.16`	`6.1.189`
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`4.16`	`6.6.158`
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`4.16`	`6.12.112`
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`4.16`	`6.18.54`
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`4.16`	`7.2.8`
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`4.16`	`7.3-rc4`