CVE-2026-54417

HIGH 7.5

Integer Overflow in rxi/microtar mtar_next() Causes Infinite Loop DoS

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-190 CWE-835
Vendor	rxi
Product	microtar
Published	Jun 17, 2026
Last Updated	Aug 10, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

rxi / microtar

0.1.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/rxi/microtar/blob/master/src/microtar.c#L239 github.com: https://github.com/rxi/microtar raw.githubusercontent.com: https://raw.githubusercontent.com/rxi/microtar/master/src/microtar.c

Credits

🔍 Saidakbarxon Maxsudxonov