Vulnerability

[ Why it matters ]Priority signals

• Public proof-of-concept exploit exists (CISA SSVC)

[ Description ]Official description

DBI versions before 1.654 for Perl incorrectly treat numeric values as strings in sql_type_cast_svpv. When casting to SQL_NUMERIC, sql_type_cast_svpv passes the string pointer and length of the SV to grok_number without stringifying it first. An integer (IV) or floating-point (NV) value has no valid string pointer, so grok_number reads from an invalid address, triggering a segmentation fault. This is reachable in Perl using the sql_type_cast function: my $num = 42; DBI::sql_type_cast( $num, DBI::SQL_NUMERIC, 0 );

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund6 Oct 2026WID-SEC-2026-3790

  Red Hat Enterprise Linux (sequoia-openpgp, perl-DBI): Multiple vulnerabilities Translated from German

  Risk mediumCVE-2026-42784CVE-2026-88815

[ References ]References

• github.com/perl5-dbi/dbi/commit/e5ad87e5602da995d28b4d65df222368b58d6702.patch
• github.com/perl5-dbi/dbi/security/advisories/GHSA-c8vq-w3wr-6979
• metacpan.org/release/HMBRAND/DBI-1.654/changes
• www.openwall.com/lists/oss-security/2026/09/28/12