CVE-2026-74564 Express — Exploit & Vulnerability Details HIGH

Parameter	Value
CVSS	7.1 (HIGH)
Affected Versions	4.14 — 7.2
Fixed In	6.6.151
Vendor	Express
Public PoC	No

In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH The XT_HASHLIMIT_RATE_MATCH flag mode changes the semantics of the dsthash_ent structure which represents an entry in the hashtable. There is a union area which uses a different layout to express the rate match mode. Update .checkentry path to validate the XT_HASHLIMIT_RATE_MATCH mode flag is requested by two or more different rules that refer to the same hashtable.

Otherwise, uninitialized access to the burst field in the union is possible. Reject the use of the XT_HASHLIMIT_RATE_MATCH mode flag if set on by revision less than 3 too.

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

None

No disruption

CVSS Vector v3.1

Vulnerable Products 5

Configuration	From (including)	Up to (excluding)
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`4.14`	`6.6.151`
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`4.14`	`6.12.103`
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`4.14`	`6.18.44`
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`4.14`	`7.1.8`
Linux Linux_Kernel cpe:2.3:o:linux:linux_kernel::::::::	`4.14`	`7.2`