DBD::Pg version 3.21.0 for Perl has a heap out-of-bounds write in quote_float. quote_float() allocates the length of the string + 1, which is the size of the bare numeric symbol plus NULL. But for special literals NaN, Inf, +Inf, -Inf, Infinity, +Infinity, -Infinity it emits the literal surrounded by quotes plus NULL, which is length + 3 bytes. Every recognised literal (case-insensitive) overflows by 2 bytes, a single quote and a NULL. This can be reached by the $dbh->quote method, for example $dbh->quote( "Infinity", DBI::SQL_NUMERIC ). This regression was introduced in 3.21.0 by the quote.c rewrite.
History

Tue, 25 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 24 Aug 2026 21:30:00 +0000

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First Time appeared Bucardo
Bucardo dbdpg
Vendors & Products Bucardo
Bucardo dbdpg

Sun, 23 Aug 2026 23:30:00 +0000

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References

Sun, 23 Aug 2026 20:00:00 +0000

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Description DBD::Pg version 3.21.0 for Perl has a heap out-of-bounds write in quote_float. quote_float() allocates the length of the string + 1, which is the size of the bare numeric symbol plus NULL. But for special literals NaN, Inf, +Inf, -Inf, Infinity, +Infinity, -Infinity it emits the literal surrounded by quotes plus NULL, which is length + 3 bytes. Every recognised literal (case-insensitive) overflows by 2 bytes, a single quote and a NULL. This can be reached by the $dbh->quote method, for example $dbh->quote( "Infinity", DBI::SQL_NUMERIC ). This regression was introduced in 3.21.0 by the quote.c rewrite.
Title DBD::Pg version 3.21.0 for Perl has a heap out-of-bounds write in quote_float
Weaknesses CWE-787
References

cve-icon MITRE

Status: PUBLISHED

Assigner: CPANSec

Published: 2026-08-23T19:53:18.185Z

Updated: 2026-08-25T19:32:39.393Z

Reserved: 2026-08-23T16:38:31.813Z

Link: CVE-2026-78183

cve-icon Vulnrichment

Updated: 2026-08-23T23:04:55.125Z

cve-icon NVD

Status : Deferred

Published: 2026-08-23T20:16:50.550

Modified: 2026-08-26T16:51:19.490

Link: CVE-2026-78183

cve-icon Redhat

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