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Medium 5.8Published Jun 12, 2026
CVE-2026-46690unbounded_spsc is an "unbounded" extension of bounded_spsc_queue.
Updated under an hour ago ()
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It affects spearman unbounded-spsc. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 5.8 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
- Weakness (CWE)
- CWE-125, CWE-415, CWE-704, CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
spearman unbounded-spsc spearman:unbounded-spsc | through 0.2.0 | NVD |
References
- https://github.com/spearman/unbounded-spsc/security/advisories/GHSA-6m57-8r3p-pqx6exploit, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.