CVE-2026-46690CWE-125CWE-415CWE-704CWE-787

unbounded-spsc: Sender::send pointer-as-value transmute causes OOB read and fake-Arc drop under TX/RX race

Medium · published June 12, 2026

CVSS v3.1
5.8
EPSS
0%
Percentile
1.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.8 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
CVSS v4.0
Not supplied
EPSS
0.00123 · 1.9th percentile
Weaknesses
CWE-125 · Out-of-bounds Read; CWE-415 · Double Free; CWE-704 · Incorrect Type Conversion or Cast; CWE-787 · Out-of-bounds Write
Published
2026-06-12T14:56Z
EPSS history
Timeline
  • 12 JUN 14:56Z
    unbounded-spsc: Sender::send pointer-as-value transmute causes OOB read and fake-Arc drop under TX/RX race
    cvelistv5