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CVE-2026-90138

kernel: vsock: don't check the listener's sk_err in vsock_accept()

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · September 17, 2026

Updated · October 6, 2026

Description

A flaw was found in the Linux kernel's vsock implementation. A local attacker can trigger a failed self-connect on a vsock socket, which leaves a stale error state. Subsequent legitimate connection attempts to the same socket are then incorrectly rejected, leading to a Denial of Service (DoS). This issue can also result in a resource leak where child sockets are not properly freed in virtio or hyperv transports.

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-772 · Missing Release of Resource after Effective Lifetime