CVE-2020-27347

tmux: stack buffer overflow in input_csi_dispatch_sgr_colon

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Severity

Moderate

Red Hat Product Security

8.5

CVSS 3.1

Review impact separately from score.

Published · October 30, 2020

Updated · November 22, 2025

Description

In tmux before version 3.1c the function input_csi_dispatch_sgr_colon() in file input.c contained a stack-based buffer-overflow that can be exploited by terminal output.

Statement

tmux as shipped with Red Hat Enterprise Linux of any version is not affected because the vulnerable code exists in newer versions of tmux than those shipped.

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 · 8.5
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

CWE-121 · Stack-based Buffer Overflow