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 the source.
Vulnerability class: Buffer Overflow
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (34.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.004 · change: -0.002
Affected products
- Rxi Microtar — versions 0.1.0
Weakness classification (CWE)
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.