CVE-2020-27347
HighPublished
tmux stack buffer overflow in function input_csi_dispatch_sgr_colon
- Published
- Nov 6, 2020
- Updated
- Sep 17, 2024
- Assigning CNA
- canonical
- Evidence observed
- Aug 8, 2026
Primary CVSS
8.8/ 10High
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H0.7%
Low · next 30 days
- Percentile
- 51.1%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
1- tmux-fuzzingPoC
Enhanced fuzzing for tmux using OSS-Fuzz. Includes custom `cmd-fuzzer` and `argument-fuzzer` harnesses for improved code coverage and a PoC for `CVE-2020-27347`
Responsible use
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