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Vulnerability record · CVE-2026-38639 · published 26 June 2026

CVE-2026-38639: Improper input validation vulnerability

An issue in the parse_month function (/time/strptime.rs) of relibc commit ab6a2e allows attackers to cause a Denial of Service (DoS) via parsing a crafted input.

7.5 CVSS 3.1 High EPSS 0.63% · top 51.9% CWE-20 · Improper input validation Deferred
7.5CVSS 3.1 base score
0.63%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
29 Jun 2026Last modified by NVD

Description

An issue in the parse_month function (/time/strptime.rs) of relibc commit ab6a2e allows attackers to cause a Denial of Service (DoS) via parsing a crafted input.

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

References

LinkTags
https://github.com/Marsman1996/pocs/tree/master/redox/CVE-2026-38639
https://gitlab.redox-os.org/redox-os/relibc/-/issues/265
https://gitlab.redox-os.org/redox-os/relibc/-/merge_requests/990
https://gitlab.redox-os.org/redox-os/relibc/-/work_items/265
https://gitlab.redox-os.org/redox-os/relibc/-/work_items/265

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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-2026-38639), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.