---
id: CVE-2026-74695
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  netfilter: nf_flow_table: drop existing skb dst before skb_dst_set_noref()

  Incoming skbs passing through netfilter flowtable offload hooks (or XFRM
  offload path) might…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  netfilter: nf_flow_table: drop existing skb dst before skb_dst_set_noref()

  Incoming skbs passing through netfilter flowtable offload hooks (or XFRM
  offload path) might…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
published: '2026-08-22'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74695'
references:
  - url: 'https://git.kernel.org/stable/c/12afa450a6a6c0cce2c42b7545a9958f62d8a00c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/538e67e8c7889cf5f93951f5309d1bcb41f86036'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8aecf0bbcc72605592134c917c222207d8f63ab0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4db3b48a966ed479b99cc8319ea9e46d4f7c703b'
  - url: 'https://git.kernel.org/stable/c/274f544a32c08638ee887f2e27e3235b6b1237d4'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74695.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-74695'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2521382'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-74695'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74695'
  - url: 'https://kernelcve.org/list/?q=CVE-2026-74695'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026082234-CVE-2026-74695-dd6d@gregkh/T
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00441
epssPercentile: 0.38092
ingestedAt: '2026-10-14T13:30:58.540Z'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 2a79fd3908acd88e6cb0e620c314d7b1fee56a02 <
    12afa450a6a6c0cce2c42b7545a9958f62d8a00c
  - >-
    Linux >= 2a79fd3908acd88e6cb0e620c314d7b1fee56a02 <
    538e67e8c7889cf5f93951f5309d1bcb41f86036
  - >-
    Linux >= 2a79fd3908acd88e6cb0e620c314d7b1fee56a02 <
    8aecf0bbcc72605592134c917c222207d8f63ab0
  - Linux b4b1adf2e66ecc7125c4117e7aad9ff61e2cfd27
  - Linux 209dedf806d31095968f54323dbe62525b077b33
  - Linux >= 4.16.15 < 4.17
  - Linux >= 4.17.1 < 4.18
  - Linux 4.18
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-16T19:14:42.839344Z'
cwe:
  - CWE-401
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_flow_table: drop existing skb dst before skb_dst_set_noref()

Incoming skbs passing through netfilter flowtable offload hooks (or XFRM
offload path) might already carry a ref-counted dst_entry assigned during
earlier RX or routing steps.

Calling skb_dst_set_noref() when skb already holds a ref-counted dst
overwrites skb->_skb_refdst, leaking the previous dst_entry reference
count and triggering a DEBUG_NET_WARN_ON_ONCE assertion in
skb_dst_check_unset():

  WARNING: at skb_dst_check_unset include/linux/skbuff.h:1170
  WARNING: at skb_dst_set_noref include/linux/skbuff.h:1234
  WARNING: at nf_flow_offload_ip_hook+0xf6c/0x2b60 net/netfilter/nf_flow_table_ip.c:864

Drop any existing dst_entry reference with skb_dst_drop(skb) before
setting the non-referenced flowtable destination.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74695.json)