---
id: CVE-2026-74281
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  tipc: reject inverted service ranges from peer bindings

  tipc_update_nametbl() inserts a binding advertised by a peer node using
  the lower and upper service-range bound…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  tipc: reject inverted service ranges from peer bindings

  tipc_update_nametbl() inserts a binding advertised by a peer node using
  the lower and upper service-range bound…
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'
cwe:
  - CWE-772
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 8
  - enterprise_linux 9
published: '2026-08-15'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T19:17:36.020'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74281'
references:
  - url: 'https://git.kernel.org/stable/c/2afb648f7b99216c687db1f89739c995e1144153'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/581ef56e5c34d475056ce086dc2ba0e872ba6857'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7e401233f9bb74a626e70698d0d62f3a94ac0676'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/973bf0ed896b9898668dbadb82ed849d7d573010'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/cd1955f81bd8ebeef51b324989ac871ad1947fb6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f1715d92ee3095d9215b493a8603a81f646fcf61'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f683200b83a0085d4e11abea8c1fdd9fdfb95b0b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74281.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-74281'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2516857'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-74281'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74281'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2026081546-CVE-2026-74281-fc97@gregkh/T
tags:
  - nvd
  - csaf
  - vex
  - red-hat
  - cve.org
  - score-dispute
epss: 0.0068
epssPercentile: 0.52196
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-16T18:52:04.430800Z'
scores:
  nvd: 7.5
  vendor: 5.5
  cna: 7.5
ingestedAt: '2026-10-16T19:46:24.385Z'
---

## Overview

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

tipc: reject inverted service ranges from peer bindings

tipc_update_nametbl() inserts a binding advertised by a peer node using
the lower and upper service-range bounds taken directly from the wire,
without checking that lower <= upper. The local bind path validates the
ordering (tipc_uaddr_valid()), but the name-distribution path does not.

A binding with lower > upper is inserted at the far end of the
service-range rbtree (keyed on lower) where no lookup or withdrawal can
ever match it (service_range_foreach_match() requires sr->lower <= end).
The publication, its service_range node and the augmented rbtree entry
are then leaked for the lifetime of the namespace, and there is no
per-peer cap equivalent to TIPC_MAX_PUBL on locally created bindings.

Reject inverted ranges in the network path as well. A peer node can
otherwise leak unbounded binding-table memory by sending PUBLICATION
items with lower > upper.

## 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 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74281.json)