What is CVE-2026-55738?

CVE-2026-55738 is a high-severity vulnerability in Rxi Microtar, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-06-17.

How severe is CVE-2026-55738?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Rxi Microtar

CVE-2026-55738

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…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Rxi Microtar — versions 0.1.0

Weakness classification (CWE)

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

References

309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (product)
309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (product)
309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (technical-description)

Frequently asked questions

What is CVE-2026-55738?: CVE-2026-55738 is a high-severity vulnerability in Rxi Microtar, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-06-17.
How severe is CVE-2026-55738?: High severity. CVSS v3 base score is 8.8 out of 10.