CVE-2020-27347
tmux stack buffer overflow in function input_csi_dispatch_sgr_colon
HIGH
7.8
CVSS Score
Published: November 6, 2020 at 02:20 AM UTC
Updated: June 17, 2026 at 03:09 AM UTC
3 products affected across 3 vendorsTmuxTmuxTmux
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Severity
HIGH7.8
Exploit prediction
EPSS 0.7%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
2.9 ≤ v ≤ 3.1b
v < 3.1c
Affected range stops below 3.1c, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (4)
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/tmux/tmux/commit/a868bacb46e3c900530bed47a1c6f85b0fbe701cx_refsource_CONFIRMRelease NotesThird Party Advisory
Source: [email protected]
https://raw.githubusercontent.com/tmux/tmux/3.1c/CHANGESVendor Advisoryx_refsource_GENTOOThird Party Advisory
Source: [email protected]
https://security.gentoo.org/glsa/202011-10x_refsource_MISCExploitMailing ListThird Party Advisory
Source: [email protected]
https://www.openwall.com/lists/oss-security/2020/11/05/3CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-121CWE-787
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