CVE-2026-57433

Critical

Description

Storable versions before 3.41 for Perl have a signed integer overflow when deserializing a crafted SX_HOOK record. retrieve_hook_common reads a signed 32-bit item count from an SX_HOOK record and calls av_extend with that count plus one. A count of I32_MAX wraps the addition to a negative value. A crafted blob passed to thaw or retrieve triggers the overflow; av_extend receives the negative count and dies with a panic, terminating the deserialization.

SeverityCritical

CVSS9.8

Exploit probability—

ProductNwclark Storable

PublishedJul 13, 2026

First seenJul 13, 2026

Weakness typeCWE-190Integer overflow

How to fix

Update

nwclark storable3.41 or later

Patches

github.com/Perl/perl5/commit/e4f681784bcdeaa91ff02a2fa4cdcae5c46779d7.patch

Affected products

Product	Affected versions	Fixed in
nwclark storable	v < 3.41	3.41

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