VulnerabilityAnalyzed
CVE-2026-46690
unbounded_spsc is an "unbounded" extension of bounded_spsc_queue.
MEDIUM 5.8EPSS 0.13%
Does this matter?
Lower severity and a low EPSS score (0.13%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.8 MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
- EPSS
- 0.13% probability · 3th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125, CWE-415, CWE-704, CWE-787
- Affected
- spearman/unbounded-spsc
- Source
- security-advisories@github.com
References
- https://github.com/spearman/unbounded-spsc/security/advisories/GHSA-6m57-8r3p-pqx6Exploit, Vendor Advisory
- https://github.com/spearman/unbounded-spsc/security/advisories/GHSA-6m57-8r3p-pqx6Exploit, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.