{"id":"CVE-2026-75614","title":"ASN1SCC: Out-of-bounds write in BitStream_DecodeConstraintWholeNumber (uPER/ACN)","summary":"ASN1SCC is an open source ASN.1 compiler for embedded systems. Prior to 4.7.0.1, BitStream_DecodeConstraintWholeNumber in asn1crt/asn1crt_encoding.c reads enough bits for a constrained integer but does not reject values above the declare…","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-129","CWE-787"],"vendor":"esa","product":"asn1scc","affected":["asn1scc < 4.7.0.1"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-11-05T18:25:12.643188Z"},"exploitAvailable":true,"published":"2026-11-05","updated":"2026-11-05","sourceUpdated":"2026-11-05T18:26:01.514Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-75614","references":[{"url":"https://github.com/esa/asn1scc/security/advisories/GHSA-825c-7h77-2jjq","label":"https://github.com/esa/asn1scc/security/advisories/GHSA-825c-7h77-2jjq"},{"url":"https://github.com/esa/asn1scc/commit/fe6ab763bc60d8a2def4104c15414809b45fffd9","label":"https://github.com/esa/asn1scc/commit/fe6ab763bc60d8a2def4104c15414809b45fffd9"},{"url":"https://github.com/esa/asn1scc/releases/tag/4.7.0.1","label":"https://github.com/esa/asn1scc/releases/tag/4.7.0.1"}],"tags":["cve.org","exploit-available"],"ingestedAt":"2026-11-05T22:38:31.469Z","slug":"CVE-2026-75614","body":"## Overview\n\nASN1SCC is an open source ASN.1 compiler for embedded systems. Prior to 4.7.0.1, BitStream_DecodeConstraintWholeNumber in asn1crt/asn1crt_encoding.c reads enough bits for a constrained integer but does not reject values above the declared range when the encoded range is not a power of two. Generated uPER and ACN decoders for variable-size SEQUENCE OF, OCTET STRING, BIT STRING, and string values use the invalid result as a loop or copy length, so a crafted over-range size field can write beyond a destination buffer. Decoding untrusted affected data can corrupt heap or stack memory, cause a crash, or potentially permit code execution. This issue is fixed in version 4.7.0.1.\n\n## Affected\n\n- `asn1scc < 4.7.0.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":57,"depthScoreParts":{"impact":44.6,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[]}