---
id: CVE-2026-15813
title: >-
  Kronosnet: kronosnet: memory corruption and out-of-bounds access via malformed
  network packet defragmentation
summary: >-
  A vulnerability was found in the network packet de-fragmentation engine of
  kronosnet (Version affected <= 1.34). The internal reassembly code does not
  properly validate sequence numbers of incoming payload fragments. An attacker
  can expl…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H'
cvssSource: cna
cwe:
  - CWE-787
vendor: Red Hat
product: kronosnet
affected:
  - kronosnet (all versions)
  - kronosnet (all versions)
  - kronosnet (all versions)
  - openshift/ose-rhel-coreos-9 (all versions)
  - openshift/ose-rhel-coreos-9 (all versions)
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-07-20T12:08:02.596188Z'
published: '2026-07-20'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T16:43:00.854Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-15813'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-15813'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2500854'
    label: RHBZ#2500854
tags:
  - cve.org
epss: 0.00359
epssPercentile: 0.29854
ingestedAt: '2026-11-05T22:38:31.395Z'
---

## Overview

A vulnerability was found in the network packet de-fragmentation engine of kronosnet (Version affected <= 1.34). The internal reassembly code does not properly validate sequence numbers of incoming payload fragments. An attacker can exploit this lack of verification by transmitting malformed packets with corrupted sequence parameters. Under specific conditions, this forces the packet processing layer to parse data outside the designated bounds of the internal memory structures, causing an out-of-bounds memory access or heap corruption. This behavior can result in sudden application crashes or system instability.

## Affected

- `kronosnet (all versions)`
- `kronosnet (all versions)`
- `kronosnet (all versions)`
- `openshift/ose-rhel-coreos-9 (all versions)`
- `openshift/ose-rhel-coreos-9 (all versions)`

## Remediation

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