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Fencer Vulns
critical 9.8

CVE-2026-57433 json

Storable versions before 3.41 for Perl have a signed integer overflow when deserializing a crafted SX_HOOK record

published 2026-07-13 3 mo ago modified 2026-10-24 15 d ago also EUVD-2026-43501

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits
0
none known

Summary

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.

Patch / fix

  • HAARG Storable 3.41
  • perl Debian 12 5.36.0-7+deb12u4
  • perl Debian 13 5.40.1-6+deb13u1
  • perl Debian 14 5.40.1-8

debian advisories DEBIAN-CVE-2026-57433

  • perl Ubuntu 22.04 LTS 5.34.0-3ubuntu1.8
  • perl Ubuntu 24.04 LTS 5.38.2-3.2ubuntu0.4
  • perl Ubuntu 26.04 LTS 5.40.1-7ubuntu0.3
  • perl Ubuntu Pro 14.04 LTS 5.18.2-2ubuntu1.7+esm8
  • perl Ubuntu Pro 16.04 LTS 5.22.1-9ubuntu0.9+esm3
  • perl Ubuntu Pro 18.04 LTS 5.26.1-6ubuntu0.7+esm3
  • perl Ubuntu Pro 20.04 LTS 5.30.0-9ubuntu0.5+esm3

ubuntu advisories UBUNTU-CVE-2026-57433

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • perl Alpine 3.24 5.42.3-r0

alpine advisories ALPINE-CVE-2026-57433

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • perl Azure Linux 3.0 5.38.2-514

azure linux advisories AZL-92415

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-57433 updated cvss 7.5

Storable: Storable: Denial of Service via signed integer overflow in deserialization

  • Red Hat Hardened Images perl-Storable 1:3.41-1.hum1
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
3 mo ago

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • HAARG Storable

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.