id summary reporter owner description type status priority milestone component version severity resolution keywords cc 5976 perl CVE-2026-13221 and 57432 Joe Locash lfs-book "Just reporting for those interested. {{{ Message-Id: Date: Mon, 13 Jul 2026 17:43:01 +0200 From: Stig Palmquist To: cve-announce@...urity.metacpan.org, oss-security@...ts.openwall.com Subject: CVE-2026-13221: Perl versions through 5.43.9 produce silently incorrect regular expression matches when an alternation of more than 65535 fixed string branches is compiled into a trie in Perl_study_chunk ======================================================================== CVE-2026-13221 CPAN Security Group ======================================================================== CVE ID: CVE-2026-13221 Distribution: perl Versions: through 5.43.9 MetaCPAN: https://metacpan.org/dist/perl VCS Repo: https://github.com/Perl/perl5 Perl versions through 5.43.9 produce silently incorrect regular expression matches when an alternation of more than 65535 fixed string branches is compiled into a trie in Perl_study_chunk Description ----------- Perl versions through 5.43.9 produce silently incorrect regular expression matches when an alternation of more than 65535 fixed string branches is compiled into a trie in Perl_study_chunk. When such branches are combined into a trie, the delta between the first branch and the shared tail is stored in a 16-bit field. A branch count above 65535 overflows the field, and the trie's match decision table is truncated with no warning or error. A pattern of this shape produces false positive matches (matching strings it should not) and false negative matches (failing to match strings it should). When such a pattern gates an access or filtering decision, the result is wrong. Problem types ------------- - CWE-190 Integer Overflow or Wraparound Solutions --------- Apply the upstream patch. The fix is included in the Perl 5.43.10 development release. References ---------- https://github.com/Perl/perl5/commit/03f74bbbd3a68350d926ee93d56ee4808c28c4c7.patch https://github.com/Perl/perl5/issues/23388 }}} {{{ Message-Id: <4707DBC6-795C-4A34-92C3-01733583170F@stig.io> Date: Mon, 13 Jul 2026 17:45:47 +0200 From: Stig Palmquist To: cve-announce@...urity.metacpan.org, oss-security@...ts.openwall.com Subject: CVE-2026-57432: Perl versions through 5.43.10 have an integer overflow in S_measure_struct leading to an out-of-bounds heap read in pack and unpack ======================================================================== CVE-2026-57432 CPAN Security Group ======================================================================== CVE ID: CVE-2026-57432 Distribution: perl Versions: through 5.43.10 MetaCPAN: https://metacpan.org/dist/perl VCS Repo: https://github.com/Perl/perl5 Perl versions through 5.43.10 have an integer overflow in S_measure_struct leading to an out-of-bounds heap read in pack and unpack Description ----------- Perl versions through 5.43.10 have an integer overflow in S_measure_struct leading to an out-of-bounds heap read in pack and unpack. S_measure_struct adds each item's size times its repeat count to a running total with no overflow check, so a large repeat count in a pack or unpack template wraps the signed SSize_t total negative. The @, X, and x position codes then guard their moves with a signed length comparison that passes when the length is negative, advancing the buffer pointer out of bounds. A template derived from untrusted input can read heap memory past the buffer and return it to the caller. Problem types ------------- - CWE-190 Integer Overflow or Wraparound - CWE-125 Out-of-bounds Read Solutions --------- Apply the upstream patches. The fix is included in the Perl 5.43.11 development release. References ---------- https://github.com/Perl/perl5/commit/5f7eb6bbbe0510964e3fb1d6bb691e5445913e55.patch https://github.com/Perl/perl5/commit/40754edc72dd3e513d758153c0e2f0215897740e.patch }}} " enhancement new normal 13.1 Book git normal