# CVE-2026-57433: Storable versions before 3.41 for Perl have a signed integer overflow when deserializing a crafted SX_HOOK record

CVE-2026-57433 is fixed in 17 products on 1 platform, first by libperl5.26 5.26.1-6ubuntu0.7+esm3, released July 13, 2026. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2026-57433
- Priority: Urgent
- CVSS: 9.8 (Critical)
- EPSS: 0.0048
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 13, 2026
- Weakness: Integer Overflow or Wraparound
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57433

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libperl5.26 Ubuntu 18.04.6 LTS (bionic) | 5.26.1-6ubuntu0.7+esm3 | [libperl5.26 5.26.1-6ubuntu0.7+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libperl5.26-5.26.1-6ubuntu0.7-esm3.md) | Jul 13, 2026 |
| Linux | libperl5.30 Ubuntu 20.04 LTS (focal) | 5.30.0-9ubuntu0.5+esm3 | [libperl5.30 5.30.0-9ubuntu0.5+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libperl5.30-5.30.0-9ubuntu0.5-esm3.md) | Jul 13, 2026 |
| Linux | libperl5.34 Ubuntu 22.04.1 LTS (jammy) | 5.34.0-3ubuntu1.8 | [libperl5.34 5.34.0-3ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libperl5.34-5.34.0-3ubuntu1.8.md) | Jul 13, 2026 |
| Linux | libperl5.38t64 Ubuntu 24.04.5 LTS (noble) | 5.38.2-3.2ubuntu0.4 | [libperl5.38t64 5.38.2-3.2ubuntu0.4](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libperl5.38t64-5.38.2-3.2ubuntu0.4.md) | Jul 13, 2026 |
| Linux | libperl5.40 Ubuntu 26.04.1 LTS (resolute) | 5.40.1-7ubuntu0.3 | [libperl5.40 5.40.1-7ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libperl5.40-5.40.1-7ubuntu0.3.md) | Jul 13, 2026 |
| Linux | perl Debian 12.15 (bookworm) | 5.36.0-7+deb12u4 | [DEBIAN-CVE-2026-57433](https://patchblox.com/security/data/fix/linux/debian-cve-2026-57433.md) | Jul 18, 2026 |
| Linux | perl Debian 13.5 (trixie) | 5.40.1-6+deb13u1 | [DEBIAN-CVE-2026-57433](https://patchblox.com/security/data/fix/linux/debian-cve-2026-57433.md) | Jul 18, 2026 |
| Linux | perl Debian 14 | 5.40.1-8 | [DEBIAN-CVE-2026-57433](https://patchblox.com/security/data/fix/linux/debian-cve-2026-57433.md) | Jul 18, 2026 |
| Linux | perl Ubuntu 18.04.6 LTS (bionic) | 5.26.1-6ubuntu0.7+esm3 | [perl 5.26.1-6ubuntu0.7+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-perl-5.26.1-6ubuntu0.7-esm3.md) | Jul 13, 2026 |
| Linux | perl Ubuntu 20.04 LTS (focal) | 5.30.0-9ubuntu0.5+esm3 | [perl 5.30.0-9ubuntu0.5+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-perl-5.30.0-9ubuntu0.5-esm3.md) | Jul 13, 2026 |
| Linux | perl Ubuntu 22.04.1 LTS (jammy) | 5.34.0-3ubuntu1.8 | [perl 5.34.0-3ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-perl-5.34.0-3ubuntu1.8.md) | Jul 13, 2026 |
| Linux | perl Ubuntu 24.04.5 LTS (noble) | 5.38.2-3.2ubuntu0.4 | [perl 5.38.2-3.2ubuntu0.4](https://patchblox.com/security/data/fix/linux/ubuntu-noble-perl-5.38.2-3.2ubuntu0.4.md) | Jul 13, 2026 |
| Linux | perl Ubuntu 26.04.1 LTS (resolute) | 5.40.1-7ubuntu0.3 | [perl 5.40.1-7ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-perl-5.40.1-7ubuntu0.3.md) | Jul 13, 2026 |
| Linux | perl-Storable amzn 2023 | 1:3.37-522.amzn2023.0.3 | [ALAS2023-2026-3203](https://patchblox.com/security/data/fix/linux/alas2023-2026-3203.md) | Nov 7, 2026 |
| Linux | perl-Storable-debuginfo amzn 2023 | 1:3.37-522.amzn2023.0.3 | [ALAS2023-2026-3203](https://patchblox.com/security/data/fix/linux/alas2023-2026-3203.md) | Nov 7, 2026 |
| Linux | perl-Storable-debugsource amzn 2023 | 1:3.37-522.amzn2023.0.3 | [ALAS2023-2026-3203](https://patchblox.com/security/data/fix/linux/alas2023-2026-3203.md) | Nov 7, 2026 |
| Linux | perl-Storable-tests amzn 2023 | 1:3.37-522.amzn2023.0.3 | [ALAS2023-2026-3203](https://patchblox.com/security/data/fix/linux/alas2023-2026-3203.md) | Nov 7, 2026 |
| Linux | perl-base Ubuntu 18.04.6 LTS (bionic) | 5.26.1-6ubuntu0.7+esm3 | [perl-base 5.26.1-6ubuntu0.7+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-perl-base-5.26.1-6ubuntu0.7-esm3.md) | Jul 13, 2026 |
| Linux | perl-base Ubuntu 20.04 LTS (focal) | 5.30.0-9ubuntu0.5+esm3 | [perl-base 5.30.0-9ubuntu0.5+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-perl-base-5.30.0-9ubuntu0.5-esm3.md) | Jul 13, 2026 |
| Linux | perl-base Ubuntu 22.04.1 LTS (jammy) | 5.34.0-3ubuntu1.8 | [perl-base 5.34.0-3ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-perl-base-5.34.0-3ubuntu1.8.md) | Jul 13, 2026 |
| Linux | perl-base Ubuntu 24.04.5 LTS (noble) | 5.38.2-3.2ubuntu0.4 | [perl-base 5.38.2-3.2ubuntu0.4](https://patchblox.com/security/data/fix/linux/ubuntu-noble-perl-base-5.38.2-3.2ubuntu0.4.md) | Jul 13, 2026 |
| Linux | perl-base Ubuntu 26.04.1 LTS (resolute) | 5.40.1-7ubuntu0.3 | [perl-base 5.40.1-7ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-perl-base-5.40.1-7ubuntu0.3.md) | Jul 13, 2026 |
| Linux | perl-debug Ubuntu 18.04.6 LTS (bionic) | 5.26.1-6ubuntu0.7+esm3 | [perl-debug 5.26.1-6ubuntu0.7+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-perl-debug-5.26.1-6ubuntu0.7-esm3.md) | Jul 13, 2026 |
| Linux | perl-debug Ubuntu 20.04 LTS (focal) | 5.30.0-9ubuntu0.5+esm3 | [perl-debug 5.30.0-9ubuntu0.5+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-perl-debug-5.30.0-9ubuntu0.5-esm3.md) | Jul 13, 2026 |
| Linux | perl-debug Ubuntu 22.04.1 LTS (jammy) | 5.34.0-3ubuntu1.8 | [perl-debug 5.34.0-3ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-perl-debug-5.34.0-3ubuntu1.8.md) | Jul 13, 2026 |
| Linux | perl-debug Ubuntu 24.04.5 LTS (noble) | 5.38.2-3.2ubuntu0.4 | [perl-debug 5.38.2-3.2ubuntu0.4](https://patchblox.com/security/data/fix/linux/ubuntu-noble-perl-debug-5.38.2-3.2ubuntu0.4.md) | Jul 13, 2026 |
| Linux | perl-debug Ubuntu 26.04.1 LTS (resolute) | 5.40.1-7ubuntu0.3 | [perl-debug 5.40.1-7ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-perl-debug-5.40.1-7ubuntu0.3.md) | Jul 13, 2026 |
| Linux | perl-modules-5.26 Ubuntu 18.04.6 LTS (bionic) | 5.26.1-6ubuntu0.7+esm3 | [perl-modules-5.26 5.26.1-6ubuntu0.7+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-perl-modules-5.26-5.26.1-6ubuntu0.7-esm3.md) | Jul 13, 2026 |
| Linux | perl-modules-5.30 Ubuntu 20.04 LTS (focal) | 5.30.0-9ubuntu0.5+esm3 | [perl-modules-5.30 5.30.0-9ubuntu0.5+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-focal-perl-modules-5.30-5.30.0-9ubuntu0.5-esm3.md) | Jul 13, 2026 |
| Linux | perl-modules-5.34 Ubuntu 22.04.1 LTS (jammy) | 5.34.0-3ubuntu1.8 | [perl-modules-5.34 5.34.0-3ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-perl-modules-5.34-5.34.0-3ubuntu1.8.md) | Jul 13, 2026 |
| Linux | perl-modules-5.38 Ubuntu 24.04.5 LTS (noble) | 5.38.2-3.2ubuntu0.4 | [perl-modules-5.38 5.38.2-3.2ubuntu0.4](https://patchblox.com/security/data/fix/linux/ubuntu-noble-perl-modules-5.38-5.38.2-3.2ubuntu0.4.md) | Jul 13, 2026 |
| Linux | perl-modules-5.40 Ubuntu 26.04.1 LTS (resolute) | 5.40.1-7ubuntu0.3 | [perl-modules-5.40 5.40.1-7ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-perl-modules-5.40-5.40.1-7ubuntu0.3.md) | Jul 13, 2026 |

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