CVE-2024-39920

kernel: TCP: SnailLoad timing side channel in TCP

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Severity

Moderate

Red Hat Product Security

4.3

CVSS 3.1

Review impact separately from score.

Published · July 3, 2024

Updated · November 21, 2025

Description

A flaw was found in the TCP protocol in RFC 9293. The TCP protocol has a timing side channel that makes it easier for remote attackers to infer the content of one TCP connection from a client system (to any server) when that client system is concurrently obtaining TCP data at a slow rate from an attacker-controlled server, aka the "SnailLoad" issue.

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 · 4.3
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CWE-385 · Covert Timing Channel