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CVE-2026-63978

kernel: net/handshake: Drain pending requests at net namespace exit

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Severity

Moderate

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · July 19, 2026

Updated · October 29, 2026

Description

A flaw was found in the Linux kernel's network handshake component. When a network namespace exits, pending handshake requests may not be properly released due to incorrect list handling. This can lead to resource leaks and a list-corruption race, potentially resulting in memory corruption. An attacker could exploit this to cause system instability or a denial of service.

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 · 7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-821 · Incorrect Synchronization