CVE-2017-20230: Storable versions before 3.05 for Perl has a stack overflow. The retrieve_hook function stored the length of

Q: How do I fix CVE-2017-20230?

storable: upgrade to 3.05. Exact commands for each OS are on this page.

Q: Is CVE-2017-20230 being exploited?

CVE-2017-20230 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2017-20230 affect?

CVE-2017-20230 affects storable. Severity is critical (CVSS 10.0). Storable versions before 3.05 for Perl has a stack overflow. The retrieve_hook function stored the length of the class name into a signed integer but in read operations treated the length as unsigned. This allowed an attacker to craft data

Q: How urgent is CVE-2017-20230?

Priority 53/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 10.0REMOTEUPGRADE

CVE-2017-20230 is a critical-severity flaw (CVSS 10.0) affecting storable. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Storable versions before 3.05 for Perl has a stack overflow. The retrieve_hook function stored the length of the class name into a signed integer but in read operations treated the length as unsigned. This allowed an attacker to craft data that could trigger the overflow.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 49%)
CISA exploited list	No
Weakness	CWE-121
Published	2026-04-21
Last modified	2026-06-17

Publisher (CNA): CPANSec · Vendor: nwclark

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-21 16:16 UTCPublished CVE record published
2026-06-17 01:15 UTCUpdated Record last modified

nwclark storable UPGRADE

Affected: < 3.05

Fixed in: 3.05

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy storable || rpm -q storable || storable --version

2. UPGRADE to 3.05 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade storable

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade storable

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-20230?

storable: upgrade to 3.05. Exact commands for each OS are on this page.

Is CVE-2017-20230 being exploited?

CVE-2017-20230 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-20230 affect?

CVE-2017-20230 affects storable. Severity is critical (CVSS 10.0). Storable versions before 3.05 for Perl has a stack overflow. The retrieve_hook function stored the length of the class name into a signed integer but in read operations treated the length as unsigned. This allowed an attacker to craft data

How urgent is CVE-2017-20230?

Priority 53/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Perl vulnerabilities

Related CVEs

CVE-2026-57433 CRITICAL 9.8 UPGRADE Storable versions before 3.41 for Perl have a signed integer overflow when deserializing a crafted SX_HOOK rec

References

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