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High ALAS2023-2026-1536 2 CVEs

Important: perl-XML-Parser security update (Amazon Linux 2023)

Published Mar 30, 2026 · Updated Apr 13, 2026

Ecosystem: Amazon Linux

Summary

Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2006-10003: XML::Parser versions through 2.47 for Perl has an off-by-one heap buffer overflow in st_serial_stack. In the case (stackptr == stacksize - 1), the stack will NOT be expanded. Then the new value will be written at location (++stackptr), which equals stacksize and therefore falls just outside the allocated buffer. The bug can be observed when parsing an XML file with very deep element nesting CVE-2006-10002: XML::Parser versions through 2.47 for Perl could overflow the pre-allocated buffer size cause a heap corruption (double free or corruption) and crashes. A :utf8 PerlIO layer, parse_stream() in Expat.xs could overflow the XML input buffer because Perl's read() returns decoded characters while SvPV() gives back multi-byte UTF-8 bytes that can exceed the pre-allocated buffer size. This can cause heap corruption (double free or corruption) and crashes.

Fixed packages 4

ReleasePackageFixed in
Amazon Linux · 2023 perl-XML-Parser 0:2.51-1.amzn2023.0.1
Amazon Linux · 2023 perl-XML-Parser-debuginfo 0:2.51-1.amzn2023.0.1
Amazon Linux · 2023 perl-XML-Parser-debugsource 0:2.51-1.amzn2023.0.1
Amazon Linux · 2023 perl-XML-Parser-tests 0:2.51-1.amzn2023.0.1

Vulnerabilities 2

  • Critical 9.8
    CVE-2006-10002

    XML::Parser versions through 2.45 for Perl could overflow the pre-allocated buffer size cause a heap corruption (double free or corruption) and crashes

    XML::Parser versions through 2.45 for Perl could overflow the pre-allocated buffer size cause a heap corruption (double free or corruption) and crashes. A :utf8 PerlIO layer, parse_stream() in Expat.xs could overflow the XML input buffer because Perl's read()…

    TODDR XML::Parser libxml-parser-perl libxml-parser-perl Debian Ubuntu
  • Critical 9.8
    CVE-2006-10003

    XML::Parser versions through 2.47 for Perl has an off-by-one heap buffer overflow in st_serial_stack

    XML::Parser versions through 2.47 for Perl has an off-by-one heap buffer overflow in st_serial_stack. In the case (stackptr == stacksize - 1), the stack will NOT be expanded. Then the new value will be written at location (++stackptr), which equals stacksize …

    TODDR XML::Parser libxml-parser-perl libxml-parser-perl Debian Ubuntu Azure Linux

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2006-10002.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2006-10003.html