JLSEC-2026-201

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Source

https://github.com/JuliaLang/SecurityAdvisories.jl/blob/main/advisories/published/2026/JLSEC-2026-201.md

Import Source

https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-201.json

JSON Data

https://api.test.osv.dev/v1/vulns/JLSEC-2026-201

Upstream

CVE-2020-21686

Published

2026-04-27T13:45:07Z

Modified

2026-07-25T18:24:35Z

Severity

5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator

Summary

[none]

Details

A stack-use-after-scope issue discovered in expand_mmac_params function in preproc.c in nasm before 2.15.04 allows remote attackers to cause a denial of service via crafted asm file.

Database specific

{
    "license":  "CC-BY-4.0",
    "sources":  [
        {
            "database_specific":  {
                "status":  "Modified"
            },
            "html_url":  "https://nvd.nist.gov/vuln/detail/CVE-2020-21686",
            "id":  "CVE-2020-21686",
            "imported":  "2026-07-17T21:20:52.738Z",
            "modified":  "2026-06-17T03:03:52.463Z",
            "published":  "2023-08-22T19:16:14.327Z",
            "url":  "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2020-21686"
        }
    ]
}

References

https://bugzilla.nasm.us/show_bug.cgi?id=3392643

Affected packages

Julia / NASM_jll

Package

Name: NASM_jll
Purl: pkg:julia/NASM_jll?uuid=08ca2550-6d73-57c0-8625-9b24120f3eae

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

2.16.1+0

Database specific

source

"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-201.json"