Process crash via overflowing SX_HOOK item count
Published Jul 13, 2026 · Updated Jul 13, 2026
Signed integer overflow in Perl Storable before 3.41 allows attackers to terminate deserialization with a crafted SX_HOOK record. The retrieve_hook_common routine adds one to an attacker-controlled signed 32-bit item count before passing it to av_extend, so I32_MAX wraps negative. Exploitation requires an application to pass the crafted blob to thaw or retrieve, which triggers a panic and crashes that Perl process.
Summary
What happened
Signed integer overflow in Perl Storable before 3.41 allows attackers to terminate deserialization with a crafted SX_HOOK record. The retrieve_hook_common routine adds one to an attacker-controlled signed 32-bit item count before passing it to av_extend, so I32_MAX wraps negative. Exploitation requires an application to pass the crafted blob to thaw or retrieve, which triggers a panic and crashes that Perl process.
The record
- CVE
- CVE-2026-57433
- Published
- Jul 13, 2026
- Updated
- Jul 13, 2026
- Vendor
- The Perl Foundation
- Product
- Storable
- Classifications
- CWE-190, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 13, 2026CVE publishedPublication date reported by the CVE source.
- Jul 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <3.41
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What is affected?
Published CVSS scores
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Attacks
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Technologies
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