Bug 2567840 (CVE-2026-75615) - CVE-2026-75615 asn1scc: ASN1SCC: Information disclosure via out-of-bounds read during string decoding
Summary: CVE-2026-75615 asn1scc: ASN1SCC: Information disclosure via out-of-bounds rea...
Keywords:
Status: NEW
Alias: CVE-2026-75615
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-05 22:30 UTC by OSIDB Bzimport
Modified: 2026-11-06 01:53 UTC (History)
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Description OSIDB Bzimport 2026-11-05 22:30:20 UTC 
ASN1SCC is an open source ASN.1 compiler for embedded systems. Prior to 4.7.0.1, the ACN runtime function Acn_Dec_String_CharIndex_private in asn1crt/asn1crt_encoding_acn.c and the generated uPER decoder InternalItem_string_with_alpha_decode in StgC/uper_c.stg do not validate a decoded character index before reading allowedCharSet. For string alphabets whose size is not a power of two, a crafted message can select an unused encoded index, read a small bounded window of adjacent static program constants, and return the byte as a successfully decoded character. The full 128-character IA5String alphabet is not affected. This issue is fixed in version 4.7.0.1.
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