Vulnerability · Published Jun 17, 2026 · Assigned by TuranSec
CVE-2026-54417Integer Overflow in rxi/microtar mtar_next() Causes Infinite Loop DoS
High 7.5
In plain English
A high-severity integer overflow in microtar from rxi. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.4%top 63.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
Weakness: CWE-190, CWE-835 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/rxi/microtar/blob/master/src/microtar.c#L239 product
- https://github.com/rxi/microtar product
- Vulnerable source code: src/microtar.c (mtar_next) technical-description