---
id: CVE-2026-80714
title: 'ipvs: do not propagate one-packet flag to synced conns'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  ipvs: do not propagate one-packet flag to synced conns

  Synced connections can be created before their destination exists. When
  the destination is later added, ip_vs_bi…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 26ec037f9841e49cc5c615deb8e1e73e5beab2ca <
    06d1d9b56ef8132fbf85006885eb43d9510b8b02
  - >-
    Linux >= 26ec037f9841e49cc5c615deb8e1e73e5beab2ca <
    acbdc276091b308ca7794acb86e761f8203e2f59
  - >-
    Linux >= 26ec037f9841e49cc5c615deb8e1e73e5beab2ca <
    300348e3ba1521b003d59825f97e24f9a6859688
  - >-
    Linux >= 26ec037f9841e49cc5c615deb8e1e73e5beab2ca <
    44af98cc7d5ef8e730488d5df1eecd5deeaa5947
  - >-
    Linux >= 26ec037f9841e49cc5c615deb8e1e73e5beab2ca <
    4649e6faeecdc2d44bfa6ccbe405eef27e55d816
  - >-
    Linux >= 26ec037f9841e49cc5c615deb8e1e73e5beab2ca <
    b5ee5b266f833601ac4817f6df0bc496fc376a28
  - >-
    Linux >= 26ec037f9841e49cc5c615deb8e1e73e5beab2ca <
    e7acfc990c29890c883d0d0ce3f737d003a43b44
  - >-
    Linux >= 26ec037f9841e49cc5c615deb8e1e73e5beab2ca <
    a63d2dbaeb50a85d4c976b15a36e6b0c7113db5b
  - Linux 2.6.36
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-10-16T19:20:40.726937Z'
published: '2026-08-28'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T19:26:34.808Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-80714'
references:
  - url: 'https://git.kernel.org/stable/c/06d1d9b56ef8132fbf85006885eb43d9510b8b02'
  - url: 'https://git.kernel.org/stable/c/acbdc276091b308ca7794acb86e761f8203e2f59'
  - url: 'https://git.kernel.org/stable/c/300348e3ba1521b003d59825f97e24f9a6859688'
  - url: 'https://git.kernel.org/stable/c/44af98cc7d5ef8e730488d5df1eecd5deeaa5947'
  - url: 'https://git.kernel.org/stable/c/4649e6faeecdc2d44bfa6ccbe405eef27e55d816'
  - url: 'https://git.kernel.org/stable/c/b5ee5b266f833601ac4817f6df0bc496fc376a28'
  - url: 'https://git.kernel.org/stable/c/e7acfc990c29890c883d0d0ce3f737d003a43b44'
  - url: 'https://git.kernel.org/stable/c/a63d2dbaeb50a85d4c976b15a36e6b0c7113db5b'
tags:
  - cve.org
epss: 0.00479
epssPercentile: 0.3992
ingestedAt: '2026-10-16T19:46:24.305Z'
---

## Overview

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

ipvs: do not propagate one-packet flag to synced conns

Synced connections can be created before their destination exists. When
the destination is later added, ip_vs_bind_dest() copies connection flags
from the destination into cp->flags.

IP_VS_CONN_F_ONE_PACKET connections are not synced. If a synced
connection inherits IP_VS_CONN_F_ONE_PACKET while it is already hashed,
expiry can treat it as a one-packet connection and skip unlinking the
existing conn_tab node, leaving stale hash nodes pointing at a freed
struct ip_vs_conn.

Drop IP_VS_CONN_F_ONE_PACKET from destination flags when binding synced
connections.

## Affected

- `Linux >= 26ec037f9841e49cc5c615deb8e1e73e5beab2ca < 06d1d9b56ef8132fbf85006885eb43d9510b8b02`
- `Linux >= 26ec037f9841e49cc5c615deb8e1e73e5beab2ca < acbdc276091b308ca7794acb86e761f8203e2f59`
- `Linux >= 26ec037f9841e49cc5c615deb8e1e73e5beab2ca < 300348e3ba1521b003d59825f97e24f9a6859688`
- `Linux >= 26ec037f9841e49cc5c615deb8e1e73e5beab2ca < 44af98cc7d5ef8e730488d5df1eecd5deeaa5947`
- `Linux >= 26ec037f9841e49cc5c615deb8e1e73e5beab2ca < 4649e6faeecdc2d44bfa6ccbe405eef27e55d816`
- `Linux >= 26ec037f9841e49cc5c615deb8e1e73e5beab2ca < b5ee5b266f833601ac4817f6df0bc496fc376a28`
- `Linux >= 26ec037f9841e49cc5c615deb8e1e73e5beab2ca < e7acfc990c29890c883d0d0ce3f737d003a43b44`
- `Linux >= 26ec037f9841e49cc5c615deb8e1e73e5beab2ca < a63d2dbaeb50a85d4c976b15a36e6b0c7113db5b`
- `Linux 2.6.36`

## Remediation

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