Integer overflow in Rxi Microtar
CVE-2026-54417
An integer overflow in the mtar_next function in src/microtar.c in rxi microtar 0.1.0 allows a remote attacker to cause a denial of service (uncontrolled CPU consumption / infinite loop) via a crafted tar archive. mtar_next computes the offset to the next record as round_up(h.size, 512) + sizeof(mtar_raw_header_t) using 32-bit arithmetic.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (36.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.004 · change: -0.003
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-2026-54417?
- CVE-2026-54417 is a high-severity vulnerability in Rxi Microtar, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2026-06-17.
- How severe is CVE-2026-54417?
- High severity. CVSS v3 base score is 7.5 out of 10.