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Vulnerability record · CVE-2026-54417 · published 17 June 2026

CVE-2026-54417: Integer overflow vulnerability

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.

8.7 CVSS 4.0 High EPSS 0.75% · top 46.9% CWE-190 · Integer overflowCWE-835 · CWE-835 Deferred
8.7CVSS 4.0 base score
0.75%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
10 Aug 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

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

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-54417), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.