CVE-2026-46690— unbounded-spsc: Sender::send pointer-as-value transmute causes OOB read and fake-Arc drop under TX/RX race
Possible ATT&CK Techniques 1AI
T1499 · Endpoint Denial of ServiceAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| spearman | unbounded-spsc | <= 0.2.0 | affected |
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I. Basic Information for CVE-2026-46690
Vulnerability Information
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Vulnerability Title
unbounded-spsc: Sender::send pointer-as-value transmute causes OOB read and fake-Arc drop under TX/RX race
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
spearman unbounded-spsc 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
unbounded-spsc是spearman组织的一个 Rust 语言第三方库。 unbounded-spsc 0.2.0及之前版本存在安全漏洞，该漏洞源于sender::send函数将指针作为值进行转换，在TX/RX竞争条件下导致越界读取和伪造Arc释放。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| spearman | unbounded-spsc | <= 0.2.0 | - |
II. Public POCs for CVE-2026-46690
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-46690 (1)
IV. Related Vulnerabilities
Same weakness: CWE-125
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libheif: Out-of-bounds read in uncompressed unci tile range - CVE-2026-12632
Out-of-bounds read in Zephyr PTP message parsing from unvali - CVE-2026-50126
adaguc-server GeoJSON coordinate parser (CConvertGeoJSON.cpp - CVE-2026-75904
libmodplug <= 0.8.9.1 - Out-of-Bounds Read in pat_smplooped
V. Comments for CVE-2026-46690
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