CVE-2026-64114
kernel: ipv4: raw: reject IP_HDRINCL packets with ihl < 5
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 19, 2026
Updated · October 27, 2026
Description
A flaw was found in the Linux kernel's handling of IPv4 raw sockets. An unprivileged attacker with CAP_NET_RAW capabilities can craft and inject a malformed IPv4 packet with an invalid Internet Header Length (IHL). This can lead to an out-of-bounds memory access when the packet is processed by certain kernel components, ultimately causing a kernel panic and a denial of service.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-20 · Improper Input Validation