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article
https://access.redhat.com/security/updates/classification/#moderate
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article
https://access.redhat.com/security/vulnerabilities/RHSB-2021-007
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2005819
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advisory
https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_4593.json
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report
https://access.redhat.com/security/cve/CVE-2021-42574
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advisory
https://www.cve.org/CVERecord?id=CVE-2021-42574
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advisory
https://nvd.nist.gov/vuln/detail/CVE-2021-42574
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article
https://trojansource.codes/
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article
https://www.lightbluetouchpaper.org/2021/11/01/trojan-source-invisible-vulnerabilities/
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article
https://www.unicode.org/reports/tr36/#Bidirectional_Text_Spoofing
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article
https://www.unicode.org/reports/tr39/