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.
Analysis
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Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
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Vendor Solution
Upgrade to version 3.21.1 or later.
Tracking
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Sun, 23 Aug 2026 20:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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 |
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Subscriptions
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MITRE
Status: PUBLISHED
Assigner: CPANSec
Published:
Updated: 2026-08-23T19:53:18.185Z
Reserved: 2026-08-23T16:38:31.813Z
Link: CVE-2026-78183
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-08-23T20:16:50.550
Modified: 2026-08-23T20:16:50.550
Link: CVE-2026-78183
Redhat
No data.
OpenCVE Enrichment
No data.
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CWE-787
Out-of-bounds Write