CVE-2026-55738

Stack Buffer Overflow in rxi/microtar raw_to_header() via non-null-terminated TAR name field

State: Published
Severity: 8.7 High
Published: Jun 17, 2026
Updated: Aug 10, 2026
Reserved: Jun 17, 2026

Description

A stack-based buffer overflow exists in the raw_to_header function in src/microtar.c in rxi microtar 0.1.0. The function copies the 100-byte name and linkname fields of a TAR header with strcpy without guaranteeing null termination of the source.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	TuranSec
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	TuranSec

Weaknesses

CWE-121 Stack-based Buffer Overflow
CWE-170 Improper Null Termination

Affected Products

Product	Versions
microtarrxi	0.1.0Affected

References

https://github.com/rxi/microtar/blob/master/src/microtar.c#L111product
https://github.com/rxi/microtarproduct
Vulnerable source code: src/microtar.c (raw_to_header)technical-description

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