Improper handling of exceptional conditions in Linux kernel - CVE-2026-64414
Published: July 27, 2026
Vulnerability identifier: #VU139548
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-64414
CWE-ID: CWE-755
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper handling of unreadable fragments in netfilter packet processing when processing packets with unreadable fragments. A remote attacker can send a specially crafted packet to cause a denial of service.
The issue affects the xt_u32 matcher, nfnetlink_queue, nfnetlink_log, and IPv6 fragment header handling in connection tracking reassembly.
Affected software
Linux kernel
How to mitigate CVE-2026-64414
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3