CVE-2026-98802

Description

A flaw was found in the Linux kernel. When processing IPv6 segment routing (seg6) headers, the kernel modifies routing and destination address fields without first ensuring that the network packet buffer is writable. If the packet buffer is shared or cloned, such as during packet inspection or capture, these modifications alter shared memory. A remote attacker sending network traffic could exploit this flaw to cause packet data corruption, resulting in inaccurate or altered data being received by local monitoring applications.

Common Vulnerability Scoring System (CVSS) Score Details

Info alert:Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 Score Breakdown

Red HatNVDcve.org
Base Score3.7N/AN/A
Attack VectorNetworkN/AN/A
Attack ComplexityHighN/AN/A
Privileges RequiredNoneN/AN/A
User InteractionNoneN/AN/A
ScopeUnchangedN/AN/A
ConfidentialityNoneN/AN/A
Integrity ImpactLowN/AN/A
Availability ImpactNoneN/AN/A

Vector

Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Understanding the Weakness (CWE)

CWE-820

Integrity,Confidentiality,Other

Technical Impact: Modify Application Data; Read Application Data; Alter Execution Logic

If access to a shared resource is not synchronized, then the resource may not be in a state that is expected by the product. This might lead to unexpected or insecure behaviors, especially if an attacker can influence the shared resource.

Frequently Asked Questions

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