{"id":"CVE-2026-46690","state":"PUBLISHED","title":"unbounded-spsc: Sender::send pointer-as-value transmute causes OOB read and fake-Arc drop under TX/RX race","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.","publishedAt":"2026-06-12T14:56:10.356Z","updatedAt":"2026-06-12T15:54:30.265Z","severity":{"score":5.8,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["spearman unbounded-spsc"],"affected":[{"vendor":"spearman","product":"unbounded-spsc","versions":[{"version":"<= 0.2.0","status":"affected"}]}],"references":["https://github.com/spearman/unbounded-spsc/security/advisories/GHSA-6m57-8r3p-pqx6"],"weaknesses":["CWE-125","CWE-415","CWE-704","CWE-787"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46690.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46690","state":"PUBLISHED","datePublished":"2026-06-12T14:56:10.356Z","dateUpdated":"2026-06-12T15:54:30.265Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-15T21:46:51.548Z"},"containers":{"cna":{"title":"unbounded-spsc: Sender::send pointer-as-value transmute causes OOB read and fake-Arc drop under TX/RX race","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"spearman","product":"unbounded-spsc","versions":[{"version":"<= 0.2.0","status":"affected"}]}],"references":[{"url":"https://github.com/spearman/unbounded-spsc/security/advisories/GHSA-6m57-8r3p-pqx6","name":"https://github.com/spearman/unbounded-spsc/security/advisories/GHSA-6m57-8r3p-pqx6","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":5.8,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","description":"CWE-125: Out-of-bounds Read","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-415","lang":"en","description":"CWE-415: Double Free","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-704","lang":"en","description":"CWE-704: Incorrect Type Conversion or Cast","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-787","lang":"en","description":"CWE-787: Out-of-bounds Write","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-12T14:56:10.356Z"},"source":{"advisory":"GHSA-6m57-8r3p-pqx6","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/spearman/unbounded-spsc/security/advisories/GHSA-6m57-8r3p-pqx6","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-12T15:54:19.131542Z","id":"CVE-2026-46690","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-12T15:54:30.265Z"}}]}}}