CVE-2026-76077

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Source
https://cve.org/CVERecord?id=CVE-2026-76077
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-76077.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-76077
Aliases
  • GHSA-38q3-fg5h-wwf9
Published
2026-11-05T16:49:58Z
Modified
2026-11-05T21:32:43Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
ASN1SCC: Stack buffer overflow and out-of-bounds read in XER tokenizer NT()
Details

ASN1SCC is an open source ASN.1 compiler for embedded systems. Prior to 4.7.0.1, the XER tokenizer NT() in asn1crt/asn1crt_encoding_xer.c, which is reached by all XER decode paths, copies tag characters into a fixed char Value[100] field without a length bound and reads input and lookahead bytes without checking the buffer count. A crafted XER message with an overlong tag can overwrite the tokenizer's stack frame, while a truncated tag or unterminated processing-instruction or comment sequence can read beyond the input and may cause a CPU spin. The flaws can disclose adjacent memory, corrupt stack data, crash or hang the decoder, and potentially permit code execution. This issue is fixed in version 4.7.0.1.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-120",
        "CWE-125",
        "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76077.json"
}
References

Affected packages

Git / github.com/esa/asn1scc

Affected ranges

Type
GIT
Repo
https://github.com/esa/asn1scc
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
8437befc92eb04f20a47c38f4ac4742c0ff1617c
Fixed
fe6ab763bc60d8a2def4104c15414809b45fffd9
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "4.7.0.1"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "fe6ab763bc60d8a2def4104c15414809b45fffd9"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "4.7.0.1",
            "range": [
                {
                    "fixed": "8437befc92eb04f20a47c38f4ac4742c0ff1617c"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

3.*
3.2.81
3.3.2
3.3.3
3.3.9
4.*
4.1.0.1f
4.1b
4.1c
4.1e
4.1f
4.2.0.1.f
4.2.1.3f
4.2.4.0f
4.2.4.3f
4.2.4.4f
4.2.4.5f
4.2.4.6f
4.2.5.0f
4.2.5.2f
4.3.0.0
4.3.0.1
4.3.1.1
4.3.1.3
4.4.0.0
4.4.0.1
4.4.0.2
4.5.0.0
4.5.0.10
4.5.0.11
4.5.0.12
4.5.0.2
4.5.0.4
4.5.1.2
4.5.1.4
4.5.1.5
4.5.2.0
4.5.2.1
4.5.2.2
4.5.2.3
4.5.2.4
4.5.2.9
4.6.0.1
4.6.0.12
4.6.0.14
4.6.0.17
4.6.0.2
4.6.0.5
4.6.0.8
4.6.0.9
v3.*
v3.2.55

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-76077.json"