---
id: CVE-2026-64114
title: 'kernel: ipv4: raw: reject IP_HDRINCL packets with ihl < 5 (CVE-2026-64114)'
summary: >-
  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-…
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: vendor
cwe: CWE-805
vendor: Red Hat
product: Red Hat Enterprise Linux BaseOS (v. 10)
affected:
  - enterprise_linux 6
  - enterprise_linux 7
  - enterprise_linux 9
  - 10base_smtv
  - enterprise_linux_appstream_v_10
  - enterprise_linux_appstream_v_9
  - enterprise_linux_baseos_v_10
  - enterprise_linux_baseos_v_8
  - enterprise_linux_baseos_v_9
  - enterprise_linux_codeready_linux_builder_v_10
  - enterprise_linux_crb_v_8
  - enterprise_linux_codeready_linux_builder_v_9
  - enterprise_linux_hidden_v_10
  - enterprise_linux_real_time_for_nfv_v_10
  - enterprise_linux_nfv_v_8
  - enterprise_linux_real_time_for_nfv_v_9
  - enterprise_linux_real_time_v_10
  - enterprise_linux_rt_v_8
  - enterprise_linux_real_time_v_9
patched:
  - 10base_smtv
  - enterprise_linux_appstream_v_10
  - enterprise_linux_appstream_v_9
  - enterprise_linux_baseos_v_10
  - enterprise_linux_baseos_v_8
  - enterprise_linux_baseos_v_9
  - enterprise_linux_codeready_linux_builder_v_10
  - enterprise_linux_crb_v_8
  - enterprise_linux_codeready_linux_builder_v_9
  - enterprise_linux_hidden_v_10
  - enterprise_linux_real_time_for_nfv_v_10
  - enterprise_linux_nfv_v_8
  - enterprise_linux_real_time_for_nfv_v_9
  - enterprise_linux_real_time_v_10
  - enterprise_linux_rt_v_8
  - enterprise_linux_real_time_v_9
published: '2026-07-19'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T04:31:39+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64114.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64114.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-64114'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2502486'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-64114'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64114'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026071923-CVE-2026-64114-d584@gregkh/T
  - url: 'https://access.redhat.com/errata/RHSA-2026:88477'
  - url: 'https://access.redhat.com/errata/RHSA-2026:86033'
  - url: 'https://access.redhat.com/errata/RHSA-2026:87375'
  - url: 'https://access.redhat.com/errata/RHSA-2026:87374'
  - url: 'https://git.kernel.org/stable/c/1065b9efa4126df559b03a849c139ecfae92cd25'
  - url: 'https://git.kernel.org/stable/c/bc20dbd48c26e743f7e0845020c11ed2ce8b15ee'
  - url: 'https://git.kernel.org/stable/c/5a564f737ec54d63e8ee221d3ff396d07586d464'
  - url: 'https://git.kernel.org/stable/c/3c5411fa4944ed99af3d9d1de750ea8169b6dac9'
  - url: 'https://git.kernel.org/stable/c/145e9afa5b905229b4788bb72c3255f5a5f77508'
  - url: 'https://git.kernel.org/stable/c/7725cd3b471740fd23d25ed1da722c671fb2a5d3'
  - url: 'https://git.kernel.org/stable/c/bbe0be67de296176e7243c76e3d9f02f6ae9ff0b'
  - url: 'https://git.kernel.org/stable/c/915fab69823a14c170dbaa3b41978768e0fe62fc'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00136
epssPercentile: 0.03015
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:36:31.414892Z'
scores:
  vendor: 7
  cna: 7.8
ingestedAt: '2026-10-16T17:24:46.806Z'
---

## Overview

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.

## Vendor advisories

- **RHSA-2026:88477** · Red Hat · fixed in: 10Base-SMTV, Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux Hidden (v. 10), Red Hat Enterprise Linux Real Time for NFV (v. 10), … · released 2026-10-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:88477)
- **RHSA-2026:86033** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9), Red Hat Enterprise Linux Real Time for NFV (v. 9), Red Hat Enterprise Linux Real Time (v. 9) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86033)
- **RHSA-2026:87375** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-10-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:87375)
- **RHSA-2026:87374** · Red Hat · fixed in: Red Hat Enterprise Linux NFV (v. 8), Red Hat Enterprise Linux RT (v. 8) · released 2026-10-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:87374)
- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 9 · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64114.json)

**kernel: ipv4: raw: reject IP_HDRINCL packets with ihl < 5** — rated Moderate by Red Hat. Released 2026-07-19, updated 2026-10-23.

Affected:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 9

Fixed:

- 10Base-SMTV
- Red Hat Enterprise Linux AppStream (v. 10)
- Red Hat Enterprise Linux AppStream (v. 9)
- Red Hat Enterprise Linux BaseOS (v. 10)
- Red Hat Enterprise Linux BaseOS (v. 8)
- Red Hat Enterprise Linux BaseOS (v. 9)
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
- Red Hat Enterprise Linux CRB (v. 8)
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
- Red Hat Enterprise Linux Hidden (v. 10)
- Red Hat Enterprise Linux Real Time for NFV (v. 10)
- Red Hat Enterprise Linux NFV (v. 8)
- Red Hat Enterprise Linux Real Time for NFV (v. 9)
- Red Hat Enterprise Linux Real Time (v. 10)
- Red Hat Enterprise Linux RT (v. 8)
- Red Hat Enterprise Linux Real Time (v. 9)

No fix planned:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 9

## Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture.

Because of this proactive approach, a patch may be associa… https://access.redhat.com/errata/RHSA-2026:88477
For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture.

Because of this proactive approach, a patch may be associa… https://access.redhat.com/errata/RHSA-2026:86033
For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture.

Because of this proactive approach, a patch may be associa… https://access.redhat.com/errata/RHSA-2026:87375