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CVE-2026-43496

kernel: net/sched: sch_red: Replace direct dequeue call with peek and qdisc_dequeue_peeked

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · May 21, 2026

Updated · July 3, 2026

Description

A flaw was found in the Linux kernel's networking scheduler component. This vulnerability occurs when a specific queueing discipline (qdisc) configuration is used, where a parent qdisc attempts to retrieve a network packet from a child qdisc. An incorrect function call during this process can lead to a null-pointer dereference, resulting in a kernel panic. This issue could allow a local attacker to cause a denial of service (DoS) on the system.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-628 · Function Call with Incorrectly Specified Arguments