CVE-2026-38640

HIGH

relibc - Denial of Service via Crafted String in __assert_fail

Title source: llm

Description

A reachable unwrap in the __assert_fail function (/assert/mod.rs) of relibc commit 61f42d allows attackers to cause a Denial of Service (DoS) via a crafted string.

References (4)

Core 4

Core References

https://gitlab.redox-os.org/redox-os/relibc/-/issues/262

https://gitlab.redox-os.org/redox-os/relibc/-/merge_requests/986

https://github.com/Marsman1996/pocs/tree/master/redox/CVE-2026-38640

View Exploit ZIP pw:eip

https://gitlab.redox-os.org/redox-os/relibc/-/work_items/262

Scores

CVSS v3 7.5

EPSS 0.0045

EPSS Percentile 36.7%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-400

Status published

Published Jun 25, 2026

Tracked Since Jun 26, 2026