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Description

unbounded_spsc is an "unbounded" extension of bounded_spsc_queue. In versions 0.2.0 and prior, sender::send pointer-as-value transmute causes OOB read and fake-Arc drop under TX/RX race. At time of publication, there are no publicly available patches.

PUBLISHED Reserved 2026-05-15 | Published 2026-06-12 | Updated 2026-06-12 | Assigner GitHub_M




MEDIUM: 5.8CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H

Problem types

CWE-125: Out-of-bounds Read

CWE-415: Double Free

CWE-704: Incorrect Type Conversion or Cast

CWE-787: Out-of-bounds Write

Product status

<= 0.2.0
affected

References

github.com/...d-spsc/security/advisories/GHSA-6m57-8r3p-pqx6 exploit

github.com/...d-spsc/security/advisories/GHSA-6m57-8r3p-pqx6

cve.org (CVE-2026-46690)

nvd.nist.gov (CVE-2026-46690)

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