fetchrow_hashref uses the string pointer of the FetchHashKeyName attribute as the key name without stringifying it first. When FetchHashKeyName has been set to an integer (IV) or floating-point (NV) value, that pointer is invalid, so reading the key name triggers a segmentation fault.
This can be triggered with the following code:
my $dbh = DBI->connect( "dbi:ExampleP:", "", "",
{ RaiseError => 0, PrintError => 0 } );
$dbh->{FetchHashKeyName} = 42;
my $sth = $dbh->prepare("select mode, size, name from .");
$sth->execute;
$sth->fetchrow_hashref;
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 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| unaffected |
|
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Vendor Solution
Upgrade to DBI 1.654 or later.
Tracking
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Mon, 28 Sep 2026 16:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | DBI versions before 1.654 for Perl incorrectly treat numeric values as strings in FetchHashKeyName. fetchrow_hashref uses the string pointer of the FetchHashKeyName attribute as the key name without stringifying it first. When FetchHashKeyName has been set to an integer (IV) or floating-point (NV) value, that pointer is invalid, so reading the key name triggers a segmentation fault. This can be triggered with the following code: my $dbh = DBI->connect( "dbi:ExampleP:", "", "", { RaiseError => 0, PrintError => 0 } ); $dbh->{FetchHashKeyName} = 42; my $sth = $dbh->prepare("select mode, size, name from ."); $sth->execute; $sth->fetchrow_hashref; | |
| Title | DBI versions before 1.654 for Perl incorrectly treat numeric values as strings in FetchHashKeyName | |
| Weaknesses | CWE-843 | |
| References |
|
Subscriptions
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MITRE
Status: PUBLISHED
Assigner: CPANSec
Published:
Updated: 2026-09-28T16:04:40.458Z
Reserved: 2026-09-10T08:47:49.901Z
Link: CVE-2026-88816
Vulnrichment
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NVD
Status : Received
Published: 2026-09-28T17:17:52.203
Modified: 2026-09-28T17:17:52.203
Link: CVE-2026-88816
Redhat
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OpenCVE Enrichment
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