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CVE-2026-53270

kernel: ipvs: clear the svc scheduler ptr early on edit

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Severity

Moderate

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · June 25, 2026

Updated · November 2, 2026

Description

A flaw was found in the Linux kernel's IP Virtual Server (IPVS) component. During the ip_vs_edit_service() operation, the svc->scheduler pointer is cleared too late when unbinding an old scheduler. This improper handling allows packets to access previously freed scheduler data, leading to a use-after-free vulnerability. This can result in 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-825 · Expired Pointer Dereference